Home / 91,428.39-137,142.60-38,800.98

Finding the Fourth Proportional to 91,428.39, 137,142.60 and 38,800.98

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Solution

The fourth proportional to 91,428.39, 137,142.60 and 38,800.98 is: 58,201.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,428.39 : 137,142.60 = 38,800.98 : x
  2. Step 2: Convert to fraction form
    91,428.39/137,142.60 = 38,800.98/x
  3. Step 3: Cross multiply
    91,428.39x = 137,142.60 × 38,800.98
  4. Step 4: Simplify right side
    91,428.39x = 5,321,267,279.75
  5. Step 5: Solve for x
    x = 5,321,267,279.75/91,428.39
  6. Step 6: Final answer
    x = 58,201.48

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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.