Home / 30,215,722.80-45,323,584.20-21,128,081.70

Finding the Fourth Proportional to 30,215,722.80, 45,323,584.20 and 21,128,081.70

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Solution

The fourth proportional to 30,215,722.80, 45,323,584.20 and 21,128,081.70 is: 31,692,122.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,215,722.80 : 45,323,584.20 = 21,128,081.70 : x
  2. Step 2: Convert to fraction form
    30,215,722.80/45,323,584.20 = 21,128,081.70/x
  3. Step 3: Cross multiply
    30,215,722.80x = 45,323,584.20 × 21,128,081.70
  4. Step 4: Simplify right side
    30,215,722.80x = 957,600,389,914,429.12
  5. Step 5: Solve for x
    x = 957,600,389,914,429.12/30,215,722.80
  6. Step 6: Final answer
    x = 31,692,122.55

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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.