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Finding the Fourth Proportional to 74,791.68, 112,158.36 and 28,019.04

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Solution

The fourth proportional to 74,791.68, 112,158.36 and 28,019.04 is: 42,017.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,791.68 : 112,158.36 = 28,019.04 : x
  2. Step 2: Convert to fraction form
    74,791.68/112,158.36 = 28,019.04/x
  3. Step 3: Cross multiply
    74,791.68x = 112,158.36 × 28,019.04
  4. Step 4: Simplify right side
    74,791.68x = 3,142,569,575.17
  5. Step 5: Solve for x
    x = 3,142,569,575.17/74,791.68
  6. Step 6: Final answer
    x = 42,017.64

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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.