Home / 285,979.46-428,972.15-86,301.50

Finding the Fourth Proportional to 285,979.46, 428,972.15 and 86,301.50

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Solution

The fourth proportional to 285,979.46, 428,972.15 and 86,301.50 is: 129,453.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,979.46 : 428,972.15 = 86,301.50 : x
  2. Step 2: Convert to fraction form
    285,979.46/428,972.15 = 86,301.50/x
  3. Step 3: Cross multiply
    285,979.46x = 428,972.15 × 86,301.50
  4. Step 4: Simplify right side
    285,979.46x = 37,020,940,487.09
  5. Step 5: Solve for x
    x = 37,020,940,487.09/285,979.46
  6. Step 6: Final answer
    x = 129,453.14

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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.