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Finding the Fourth Proportional to 99,381.65, 137,122.94 and 67,176.32

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Solution

The fourth proportional to 99,381.65, 137,122.94 and 67,176.32 is: 92,687.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,381.65 : 137,122.94 = 67,176.32 : x
  2. Step 2: Convert to fraction form
    99,381.65/137,122.94 = 67,176.32/x
  3. Step 3: Cross multiply
    99,381.65x = 137,122.94 × 67,176.32
  4. Step 4: Simplify right side
    99,381.65x = 9,211,413,979.11
  5. Step 5: Solve for x
    x = 9,211,413,979.11/99,381.65
  6. Step 6: Final answer
    x = 92,687.28

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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.