Home / 285,932.16-428,758.56-86,214.96

Finding the Fourth Proportional to 285,932.16, 428,758.56 and 86,214.96

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Solution

The fourth proportional to 285,932.16, 428,758.56 and 86,214.96 is: 129,280.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,932.16 : 428,758.56 = 86,214.96 : x
  2. Step 2: Convert to fraction form
    285,932.16/428,758.56 = 86,214.96/x
  3. Step 3: Cross multiply
    285,932.16x = 428,758.56 × 86,214.96
  4. Step 4: Simplify right side
    285,932.16x = 36,965,402,100.06
  5. Step 5: Solve for x
    x = 36,965,402,100.06/285,932.16
  6. Step 6: Final answer
    x = 129,280.32

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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.