Home / 86,938.19-130,391.87-39,542.21

Finding the Fourth Proportional to 86,938.19, 130,391.87 and 39,542.21

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Solution

The fourth proportional to 86,938.19, 130,391.87 and 39,542.21 is: 59,306.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,938.19 : 130,391.87 = 39,542.21 : x
  2. Step 2: Convert to fraction form
    86,938.19/130,391.87 = 39,542.21/x
  3. Step 3: Cross multiply
    86,938.19x = 130,391.87 × 39,542.21
  4. Step 4: Simplify right side
    86,938.19x = 5,155,981,856.16
  5. Step 5: Solve for x
    x = 5,155,981,856.16/86,938.19
  6. Step 6: Final answer
    x = 59,306.30

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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.