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Finding the Fourth Proportional to 161,490.87, 242,290.64 and 71,521.11

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Solution

The fourth proportional to 161,490.87, 242,290.64 and 71,521.11 is: 107,305.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,490.87 : 242,290.64 = 71,521.11 : x
  2. Step 2: Convert to fraction form
    161,490.87/242,290.64 = 71,521.11/x
  3. Step 3: Cross multiply
    161,490.87x = 242,290.64 × 71,521.11
  4. Step 4: Simplify right side
    161,490.87x = 17,328,895,157.80
  5. Step 5: Solve for x
    x = 17,328,895,157.80/161,490.87
  6. Step 6: Final answer
    x = 107,305.73

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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.