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Finding the Fourth Proportional to 65,545.79, 90,417.71 and 54,147.87

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Solution

The fourth proportional to 65,545.79, 90,417.71 and 54,147.87 is: 74,694.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,545.79 : 90,417.71 = 54,147.87 : x
  2. Step 2: Convert to fraction form
    65,545.79/90,417.71 = 54,147.87/x
  3. Step 3: Cross multiply
    65,545.79x = 90,417.71 × 54,147.87
  4. Step 4: Simplify right side
    65,545.79x = 4,895,926,542.15
  5. Step 5: Solve for x
    x = 4,895,926,542.15/65,545.79
  6. Step 6: Final answer
    x = 74,694.76

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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.