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Finding the Fourth Proportional to 91,625.40, 137,438.10 and 54,761.40

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Solution

The fourth proportional to 91,625.40, 137,438.10 and 54,761.40 is: 82,142.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,625.40 : 137,438.10 = 54,761.40 : x
  2. Step 2: Convert to fraction form
    91,625.40/137,438.10 = 54,761.40/x
  3. Step 3: Cross multiply
    91,625.40x = 137,438.10 × 54,761.40
  4. Step 4: Simplify right side
    91,625.40x = 7,526,302,769.34
  5. Step 5: Solve for x
    x = 7,526,302,769.34/91,625.40
  6. Step 6: Final answer
    x = 82,142.10

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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.