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Finding the Fourth Proportional to 83,639, 125,143.40 and 58,728.26

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Solution

The fourth proportional to 83,639, 125,143.40 and 58,728.26 is: 87,871.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,639 : 125,143.40 = 58,728.26 : x
  2. Step 2: Convert to fraction form
    83,639/125,143.40 = 58,728.26/x
  3. Step 3: Cross multiply
    83,639x = 125,143.40 × 58,728.26
  4. Step 4: Simplify right side
    83,639x = 7,349,454,132.48
  5. Step 5: Solve for x
    x = 7,349,454,132.48/83,639
  6. Step 6: Final answer
    x = 87,871.14

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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.