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Finding the Fourth Proportional to 97,672.80, 146,278.80 and 66,338.40

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Solution

The fourth proportional to 97,672.80, 146,278.80 and 66,338.40 is: 99,351.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,672.80 : 146,278.80 = 66,338.40 : x
  2. Step 2: Convert to fraction form
    97,672.80/146,278.80 = 66,338.40/x
  3. Step 3: Cross multiply
    97,672.80x = 146,278.80 × 66,338.40
  4. Step 4: Simplify right side
    97,672.80x = 9,703,901,545.92
  5. Step 5: Solve for x
    x = 9,703,901,545.92/97,672.80
  6. Step 6: Final answer
    x = 99,351.11

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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.