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Finding the Fourth Proportional to 56,872.80, 85,163.40 and 42,001.20

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Solution

The fourth proportional to 56,872.80, 85,163.40 and 42,001.20 is: 62,894.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,872.80 : 85,163.40 = 42,001.20 : x
  2. Step 2: Convert to fraction form
    56,872.80/85,163.40 = 42,001.20/x
  3. Step 3: Cross multiply
    56,872.80x = 85,163.40 × 42,001.20
  4. Step 4: Simplify right side
    56,872.80x = 3,576,964,996.08
  5. Step 5: Solve for x
    x = 3,576,964,996.08/56,872.80
  6. Step 6: Final answer
    x = 62,894.13

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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.