Home / 90,631.20-135,946.80-59,138.40

Finding the Fourth Proportional to 90,631.20, 135,946.80 and 59,138.40

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Solution

The fourth proportional to 90,631.20, 135,946.80 and 59,138.40 is: 88,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,631.20 : 135,946.80 = 59,138.40 : x
  2. Step 2: Convert to fraction form
    90,631.20/135,946.80 = 59,138.40/x
  3. Step 3: Cross multiply
    90,631.20x = 135,946.80 × 59,138.40
  4. Step 4: Simplify right side
    90,631.20x = 8,039,676,237.12
  5. Step 5: Solve for x
    x = 8,039,676,237.12/90,631.20
  6. Step 6: Final answer
    x = 88,707.60

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Similar ratio
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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.