Home / 85,428.30-128,118.23-35,446.55

Finding the Fourth Proportional to 85,428.30, 128,118.23 and 35,446.55

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Solution

The fourth proportional to 85,428.30, 128,118.23 and 35,446.55 is: 53,159.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,428.30 : 128,118.23 = 35,446.55 : x
  2. Step 2: Convert to fraction form
    85,428.30/128,118.23 = 35,446.55/x
  3. Step 3: Cross multiply
    85,428.30x = 128,118.23 × 35,446.55
  4. Step 4: Simplify right side
    85,428.30x = 4,541,349,654.52
  5. Step 5: Solve for x
    x = 4,541,349,654.52/85,428.30
  6. Step 6: Final answer
    x = 53,159.78

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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.