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Finding the Fourth Proportional to 123,490.18, 170,424.31 and 75,737.03

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Solution

The fourth proportional to 123,490.18, 170,424.31 and 75,737.03 is: 104,521.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,490.18 : 170,424.31 = 75,737.03 : x
  2. Step 2: Convert to fraction form
    123,490.18/170,424.31 = 75,737.03/x
  3. Step 3: Cross multiply
    123,490.18x = 170,424.31 × 75,737.03
  4. Step 4: Simplify right side
    123,490.18x = 12,907,431,079.20
  5. Step 5: Solve for x
    x = 12,907,431,079.20/123,490.18
  6. Step 6: Final answer
    x = 104,521.92

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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.