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Finding the Fourth Proportional to 91,387.60, 137,081.40 and 42,235.60

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Solution

The fourth proportional to 91,387.60, 137,081.40 and 42,235.60 is: 63,353.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,387.60 : 137,081.40 = 42,235.60 : x
  2. Step 2: Convert to fraction form
    91,387.60/137,081.40 = 42,235.60/x
  3. Step 3: Cross multiply
    91,387.60x = 137,081.40 × 42,235.60
  4. Step 4: Simplify right side
    91,387.60x = 5,789,715,177.84
  5. Step 5: Solve for x
    x = 5,789,715,177.84/91,387.60
  6. Step 6: Final answer
    x = 63,353.40

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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.