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Finding the Fourth Proportional to 71,909.05, 99,241.50 and 53,728.22

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Solution

The fourth proportional to 71,909.05, 99,241.50 and 53,728.22 is: 74,150.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,909.05 : 99,241.50 = 53,728.22 : x
  2. Step 2: Convert to fraction form
    71,909.05/99,241.50 = 53,728.22/x
  3. Step 3: Cross multiply
    71,909.05x = 99,241.50 × 53,728.22
  4. Step 4: Simplify right side
    71,909.05x = 5,332,069,393.23
  5. Step 5: Solve for x
    x = 5,332,069,393.23/71,909.05
  6. Step 6: Final answer
    x = 74,150.19

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1.5x scale

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.