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Finding the Fourth Proportional to 91,473.80, 137,210.70 and 38,865.80

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Solution

The fourth proportional to 91,473.80, 137,210.70 and 38,865.80 is: 58,298.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,473.80 : 137,210.70 = 38,865.80 : x
  2. Step 2: Convert to fraction form
    91,473.80/137,210.70 = 38,865.80/x
  3. Step 3: Cross multiply
    91,473.80x = 137,210.70 × 38,865.80
  4. Step 4: Simplify right side
    91,473.80x = 5,332,803,624.06
  5. Step 5: Solve for x
    x = 5,332,803,624.06/91,473.80
  6. Step 6: Final answer
    x = 58,298.70

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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.