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Finding the Fourth Proportional to 73,747.80, 110,630.88 and 21,158.28

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Solution

The fourth proportional to 73,747.80, 110,630.88 and 21,158.28 is: 31,740.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,747.80 : 110,630.88 = 21,158.28 : x
  2. Step 2: Convert to fraction form
    73,747.80/110,630.88 = 21,158.28/x
  3. Step 3: Cross multiply
    73,747.80x = 110,630.88 × 21,158.28
  4. Step 4: Simplify right side
    73,747.80x = 2,340,759,135.69
  5. Step 5: Solve for x
    x = 2,340,759,135.69/73,747.80
  6. Step 6: Final answer
    x = 31,740.05

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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.