Home / 103,657.43-155,792.87-86,002.61

Finding the Fourth Proportional to 103,657.43, 155,792.87 and 86,002.61

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Solution

The fourth proportional to 103,657.43, 155,792.87 and 86,002.61 is: 129,258.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,657.43 : 155,792.87 = 86,002.61 : x
  2. Step 2: Convert to fraction form
    103,657.43/155,792.87 = 86,002.61/x
  3. Step 3: Cross multiply
    103,657.43x = 155,792.87 × 86,002.61
  4. Step 4: Simplify right side
    103,657.43x = 13,398,593,439.39
  5. Step 5: Solve for x
    x = 13,398,593,439.39/103,657.43
  6. Step 6: Final answer
    x = 129,258.40

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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.