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Finding the Fourth Proportional to 115,737.60, 159,717.12 and 65,436.80

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Solution

The fourth proportional to 115,737.60, 159,717.12 and 65,436.80 is: 90,302.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,737.60 : 159,717.12 = 65,436.80 : x
  2. Step 2: Convert to fraction form
    115,737.60/159,717.12 = 65,436.80/x
  3. Step 3: Cross multiply
    115,737.60x = 159,717.12 × 65,436.80
  4. Step 4: Simplify right side
    115,737.60x = 10,451,377,238.02
  5. Step 5: Solve for x
    x = 10,451,377,238.02/115,737.60
  6. Step 6: Final answer
    x = 90,302.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.