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Finding the Fourth Proportional to 125,140.06, 187,626.69 and 65,020.80

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Solution

The fourth proportional to 125,140.06, 187,626.69 and 65,020.80 is: 97,487.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,140.06 : 187,626.69 = 65,020.80 : x
  2. Step 2: Convert to fraction form
    125,140.06/187,626.69 = 65,020.80/x
  3. Step 3: Cross multiply
    125,140.06x = 187,626.69 × 65,020.80
  4. Step 4: Simplify right side
    125,140.06x = 12,199,636,781.55
  5. Step 5: Solve for x
    x = 12,199,636,781.55/125,140.06
  6. Step 6: Final answer
    x = 97,487.86

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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.