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Finding the Fourth Proportional to 85,412.52, 128,133.36 and 38,044.53

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Solution

The fourth proportional to 85,412.52, 128,133.36 and 38,044.53 is: 57,073.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,412.52 : 128,133.36 = 38,044.53 : x
  2. Step 2: Convert to fraction form
    85,412.52/128,133.36 = 38,044.53/x
  3. Step 3: Cross multiply
    85,412.52x = 128,133.36 × 38,044.53
  4. Step 4: Simplify right side
    85,412.52x = 4,874,773,458.52
  5. Step 5: Solve for x
    x = 4,874,773,458.52/85,412.52
  6. Step 6: Final answer
    x = 57,073.29

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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.