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Finding the Fourth Proportional to 268,211.92, 402,318.84 and 90,720.40

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Solution

The fourth proportional to 268,211.92, 402,318.84 and 90,720.40 is: 136,080.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,211.92 : 402,318.84 = 90,720.40 : x
  2. Step 2: Convert to fraction form
    268,211.92/402,318.84 = 90,720.40/x
  3. Step 3: Cross multiply
    268,211.92x = 402,318.84 × 90,720.40
  4. Step 4: Simplify right side
    268,211.92x = 36,498,526,092.34
  5. Step 5: Solve for x
    x = 36,498,526,092.34/268,211.92
  6. Step 6: Final answer
    x = 136,080.92

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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.