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Finding the Fourth Proportional to 99,853,294.60, 149,779,941.90 and 81,713,441.80

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Solution

The fourth proportional to 99,853,294.60, 149,779,941.90 and 81,713,441.80 is: 122,570,162.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,853,294.60 : 149,779,941.90 = 81,713,441.80 : x
  2. Step 2: Convert to fraction form
    99,853,294.60/149,779,941.90 = 81,713,441.80/x
  3. Step 3: Cross multiply
    99,853,294.60x = 149,779,941.90 × 81,713,441.80
  4. Step 4: Simplify right side
    99,853,294.60x = 12,239,034,565,253,032
  5. Step 5: Solve for x
    x = 12,239,034,565,253,032/99,853,294.60
  6. Step 6: Final answer
    x = 122,570,162.70

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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.