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Finding the Fourth Proportional to 124,839.10, 187,376.10 and 65,717.20

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Solution

The fourth proportional to 124,839.10, 187,376.10 and 65,717.20 is: 98,637.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,839.10 : 187,376.10 = 65,717.20 : x
  2. Step 2: Convert to fraction form
    124,839.10/187,376.10 = 65,717.20/x
  3. Step 3: Cross multiply
    124,839.10x = 187,376.10 × 65,717.20
  4. Step 4: Simplify right side
    124,839.10x = 12,313,832,638.92
  5. Step 5: Solve for x
    x = 12,313,832,638.92/124,839.10
  6. Step 6: Final answer
    x = 98,637.63

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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.