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Finding the Fourth Proportional to 145,381.62, 200,542.95 and 90,839.19

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Solution

The fourth proportional to 145,381.62, 200,542.95 and 90,839.19 is: 125,305.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,381.62 : 200,542.95 = 90,839.19 : x
  2. Step 2: Convert to fraction form
    145,381.62/200,542.95 = 90,839.19/x
  3. Step 3: Cross multiply
    145,381.62x = 200,542.95 × 90,839.19
  4. Step 4: Simplify right side
    145,381.62x = 18,217,159,138.21
  5. Step 5: Solve for x
    x = 18,217,159,138.21/145,381.62
  6. Step 6: Final answer
    x = 125,305.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.