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Finding the Fourth Proportional to 123,357.92, 170,215.47 and 72,351.41

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Solution

The fourth proportional to 123,357.92, 170,215.47 and 72,351.41 is: 99,834.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,357.92 : 170,215.47 = 72,351.41 : x
  2. Step 2: Convert to fraction form
    123,357.92/170,215.47 = 72,351.41/x
  3. Step 3: Cross multiply
    123,357.92x = 170,215.47 × 72,351.41
  4. Step 4: Simplify right side
    123,357.92x = 12,315,328,407.24
  5. Step 5: Solve for x
    x = 12,315,328,407.24/123,357.92
  6. Step 6: Final answer
    x = 99,834.12

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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.