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Finding the Fourth Proportional to 91,732.40, 137,728.20 and 56,740.40

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Solution

The fourth proportional to 91,732.40, 137,728.20 and 56,740.40 is: 85,190.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,732.40 : 137,728.20 = 56,740.40 : x
  2. Step 2: Convert to fraction form
    91,732.40/137,728.20 = 56,740.40/x
  3. Step 3: Cross multiply
    91,732.40x = 137,728.20 × 56,740.40
  4. Step 4: Simplify right side
    91,732.40x = 7,814,753,159.28
  5. Step 5: Solve for x
    x = 7,814,753,159.28/91,732.40
  6. Step 6: Final answer
    x = 85,190.76

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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.