Home / 86,389.38-129,979.35-51,355.26

Finding the Fourth Proportional to 86,389.38, 129,979.35 and 51,355.26

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Solution

The fourth proportional to 86,389.38, 129,979.35 and 51,355.26 is: 77,267.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,389.38 : 129,979.35 = 51,355.26 : x
  2. Step 2: Convert to fraction form
    86,389.38/129,979.35 = 51,355.26/x
  3. Step 3: Cross multiply
    86,389.38x = 129,979.35 × 51,355.26
  4. Step 4: Simplify right side
    86,389.38x = 6,675,123,313.88
  5. Step 5: Solve for x
    x = 6,675,123,313.88/86,389.38
  6. Step 6: Final answer
    x = 77,267.87

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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.