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Finding the Fourth Proportional to 119,892.30, 165,349.80 and 72,136.73

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Solution

The fourth proportional to 119,892.30, 165,349.80 and 72,136.73 is: 99,487.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,892.30 : 165,349.80 = 72,136.73 : x
  2. Step 2: Convert to fraction form
    119,892.30/165,349.80 = 72,136.73/x
  3. Step 3: Cross multiply
    119,892.30x = 165,349.80 × 72,136.73
  4. Step 4: Simplify right side
    119,892.30x = 11,927,793,051.41
  5. Step 5: Solve for x
    x = 11,927,793,051.41/119,892.30
  6. Step 6: Final answer
    x = 99,487.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.