Home / 75,136.78-103,700.14-42,871.24

Finding the Fourth Proportional to 75,136.78, 103,700.14 and 42,871.24

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Solution

The fourth proportional to 75,136.78, 103,700.14 and 42,871.24 is: 59,168.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,136.78 : 103,700.14 = 42,871.24 : x
  2. Step 2: Convert to fraction form
    75,136.78/103,700.14 = 42,871.24/x
  3. Step 3: Cross multiply
    75,136.78x = 103,700.14 × 42,871.24
  4. Step 4: Simplify right side
    75,136.78x = 4,445,753,589.97
  5. Step 5: Solve for x
    x = 4,445,753,589.97/75,136.78
  6. Step 6: Final answer
    x = 59,168.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.