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Finding the Fourth Proportional to 113,144.80, 169,717.20 and 65,711.20

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Solution

The fourth proportional to 113,144.80, 169,717.20 and 65,711.20 is: 98,566.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,144.80 : 169,717.20 = 65,711.20 : x
  2. Step 2: Convert to fraction form
    113,144.80/169,717.20 = 65,711.20/x
  3. Step 3: Cross multiply
    113,144.80x = 169,717.20 × 65,711.20
  4. Step 4: Simplify right side
    113,144.80x = 11,152,320,872.64
  5. Step 5: Solve for x
    x = 11,152,320,872.64/113,144.80
  6. Step 6: Final answer
    x = 98,566.80

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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.