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Finding the Fourth Proportional to 81,124.90, 121,572.15 and 59,899.30

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Solution

The fourth proportional to 81,124.90, 121,572.15 and 59,899.30 is: 89,763.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,124.90 : 121,572.15 = 59,899.30 : x
  2. Step 2: Convert to fraction form
    81,124.90/121,572.15 = 59,899.30/x
  3. Step 3: Cross multiply
    81,124.90x = 121,572.15 × 59,899.30
  4. Step 4: Simplify right side
    81,124.90x = 7,282,086,684.50
  5. Step 5: Solve for x
    x = 7,282,086,684.50/81,124.90
  6. Step 6: Final answer
    x = 89,763.89

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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.