Home / 86,488.08-129,732.12-39,780.24

Finding the Fourth Proportional to 86,488.08, 129,732.12 and 39,780.24

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Solution

The fourth proportional to 86,488.08, 129,732.12 and 39,780.24 is: 59,670.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,488.08 : 129,732.12 = 39,780.24 : x
  2. Step 2: Convert to fraction form
    86,488.08/129,732.12 = 39,780.24/x
  3. Step 3: Cross multiply
    86,488.08x = 129,732.12 × 39,780.24
  4. Step 4: Simplify right side
    86,488.08x = 5,160,774,869.31
  5. Step 5: Solve for x
    x = 5,160,774,869.31/86,488.08
  6. Step 6: Final answer
    x = 59,670.36

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Similar ratio
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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.