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Finding the Fourth Proportional to 30,267,901.80, 45,401,852.70 and 21,180,260.70

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Solution

The fourth proportional to 30,267,901.80, 45,401,852.70 and 21,180,260.70 is: 31,770,391.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,267,901.80 : 45,401,852.70 = 21,180,260.70 : x
  2. Step 2: Convert to fraction form
    30,267,901.80/45,401,852.70 = 21,180,260.70/x
  3. Step 3: Cross multiply
    30,267,901.80x = 45,401,852.70 × 21,180,260.70
  4. Step 4: Simplify right side
    30,267,901.80x = 961,623,076,448,998.88
  5. Step 5: Solve for x
    x = 961,623,076,448,998.88/30,267,901.80
  6. Step 6: Final answer
    x = 31,770,391.05

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.