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Finding the Fourth Proportional to 91,410.20, 137,115.30 and 42,258.20

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Solution

The fourth proportional to 91,410.20, 137,115.30 and 42,258.20 is: 63,387.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,410.20 : 137,115.30 = 42,258.20 : x
  2. Step 2: Convert to fraction form
    91,410.20/137,115.30 = 42,258.20/x
  3. Step 3: Cross multiply
    91,410.20x = 137,115.30 × 42,258.20
  4. Step 4: Simplify right side
    91,410.20x = 5,794,245,770.46
  5. Step 5: Solve for x
    x = 5,794,245,770.46/91,410.20
  6. Step 6: Final answer
    x = 63,387.30

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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.