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Finding the Fourth Proportional to 145,019.57, 217,520.57 and 86,229.36

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Solution

The fourth proportional to 145,019.57, 217,520.57 and 86,229.36 is: 129,338.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,019.57 : 217,520.57 = 86,229.36 : x
  2. Step 2: Convert to fraction form
    145,019.57/217,520.57 = 86,229.36/x
  3. Step 3: Cross multiply
    145,019.57x = 217,520.57 × 86,229.36
  4. Step 4: Simplify right side
    145,019.57x = 18,756,659,753.51
  5. Step 5: Solve for x
    x = 18,756,659,753.51/145,019.57
  6. Step 6: Final answer
    x = 129,338.82

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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.