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Finding the Fourth Proportional to 125,344.72, 172,928.52 and 80,024.40

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Solution

The fourth proportional to 125,344.72, 172,928.52 and 80,024.40 is: 110,403.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,344.72 : 172,928.52 = 80,024.40 : x
  2. Step 2: Convert to fraction form
    125,344.72/172,928.52 = 80,024.40/x
  3. Step 3: Cross multiply
    125,344.72x = 172,928.52 × 80,024.40
  4. Step 4: Simplify right side
    125,344.72x = 13,838,501,055.89
  5. Step 5: Solve for x
    x = 13,838,501,055.89/125,344.72
  6. Step 6: Final answer
    x = 110,403.54

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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.