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Finding the Fourth Proportional to 89,241.20, 133,926.54 and 71,920.16

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Solution

The fourth proportional to 89,241.20, 133,926.54 and 71,920.16 is: 107,932.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,241.20 : 133,926.54 = 71,920.16 : x
  2. Step 2: Convert to fraction form
    89,241.20/133,926.54 = 71,920.16/x
  3. Step 3: Cross multiply
    89,241.20x = 133,926.54 × 71,920.16
  4. Step 4: Simplify right side
    89,241.20x = 9,632,018,185.05
  5. Step 5: Solve for x
    x = 9,632,018,185.05/89,241.20
  6. Step 6: Final answer
    x = 107,932.41

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1.5x scale

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.