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Finding the Fourth Proportional to 124,896.80, 187,345.20 and 72,441.20

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Solution

The fourth proportional to 124,896.80, 187,345.20 and 72,441.20 is: 108,661.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,896.80 : 187,345.20 = 72,441.20 : x
  2. Step 2: Convert to fraction form
    124,896.80/187,345.20 = 72,441.20/x
  3. Step 3: Cross multiply
    124,896.80x = 187,345.20 × 72,441.20
  4. Step 4: Simplify right side
    124,896.80x = 13,571,511,102.24
  5. Step 5: Solve for x
    x = 13,571,511,102.24/124,896.80
  6. Step 6: Final answer
    x = 108,661.80

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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.