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Finding the Fourth Proportional to 99,668,515.80, 149,502,773.70 and 61,205,309.40

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Solution

The fourth proportional to 99,668,515.80, 149,502,773.70 and 61,205,309.40 is: 91,807,964.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,668,515.80 : 149,502,773.70 = 61,205,309.40 : x
  2. Step 2: Convert to fraction form
    99,668,515.80/149,502,773.70 = 61,205,309.40/x
  3. Step 3: Cross multiply
    99,668,515.80x = 149,502,773.70 × 61,205,309.40
  4. Step 4: Simplify right side
    99,668,515.80x = 9,150,363,520,466,682
  5. Step 5: Solve for x
    x = 9,150,363,520,466,682/99,668,515.80
  6. Step 6: Final answer
    x = 91,807,964.10

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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.