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Finding the Fourth Proportional to 102,520.80, 153,781.20 and 67,269.60

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Solution

The fourth proportional to 102,520.80, 153,781.20 and 67,269.60 is: 100,904.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,520.80 : 153,781.20 = 67,269.60 : x
  2. Step 2: Convert to fraction form
    102,520.80/153,781.20 = 67,269.60/x
  3. Step 3: Cross multiply
    102,520.80x = 153,781.20 × 67,269.60
  4. Step 4: Simplify right side
    102,520.80x = 10,344,799,811.52
  5. Step 5: Solve for x
    x = 10,344,799,811.52/102,520.80
  6. Step 6: Final answer
    x = 100,904.40

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1.5x scale

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.