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Finding the Fourth Proportional to 99,651,853.80, 149,477,780.70 and 90,564,212.70

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Solution

The fourth proportional to 99,651,853.80, 149,477,780.70 and 90,564,212.70 is: 135,846,319.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,651,853.80 : 149,477,780.70 = 90,564,212.70 : x
  2. Step 2: Convert to fraction form
    99,651,853.80/149,477,780.70 = 90,564,212.70/x
  3. Step 3: Cross multiply
    99,651,853.80x = 149,477,780.70 × 90,564,212.70
  4. Step 4: Simplify right side
    99,651,853.80x = 13,537,337,525,238,754
  5. Step 5: Solve for x
    x = 13,537,337,525,238,754/99,651,853.80
  6. Step 6: Final answer
    x = 135,846,319.05

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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.