Home / 285,731.55-428,458.82-86,014.71

Finding the Fourth Proportional to 285,731.55, 428,458.82 and 86,014.71

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Solution

The fourth proportional to 285,731.55, 428,458.82 and 86,014.71 is: 128,980.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,731.55 : 428,458.82 = 86,014.71 : x
  2. Step 2: Convert to fraction form
    285,731.55/428,458.82 = 86,014.71/x
  3. Step 3: Cross multiply
    285,731.55x = 428,458.82 × 86,014.71
  4. Step 4: Simplify right side
    285,731.55x = 36,853,760,719.17
  5. Step 5: Solve for x
    x = 36,853,760,719.17/285,731.55
  6. Step 6: Final answer
    x = 128,980.37

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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.