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Finding the Fourth Proportional to 173,856.80, 260,708.40 and 80,391.20

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Solution

The fourth proportional to 173,856.80, 260,708.40 and 80,391.20 is: 120,551.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,856.80 : 260,708.40 = 80,391.20 : x
  2. Step 2: Convert to fraction form
    173,856.80/260,708.40 = 80,391.20/x
  3. Step 3: Cross multiply
    173,856.80x = 260,708.40 × 80,391.20
  4. Step 4: Simplify right side
    173,856.80x = 20,958,661,126.08
  5. Step 5: Solve for x
    x = 20,958,661,126.08/173,856.80
  6. Step 6: Final answer
    x = 120,551.29

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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.