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Finding the Fourth Proportional to 125,343.72, 172,927.14 and 80,023.40

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Solution

The fourth proportional to 125,343.72, 172,927.14 and 80,023.40 is: 110,402.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,343.72 : 172,927.14 = 80,023.40 : x
  2. Step 2: Convert to fraction form
    125,343.72/172,927.14 = 80,023.40/x
  3. Step 3: Cross multiply
    125,343.72x = 172,927.14 × 80,023.40
  4. Step 4: Simplify right side
    125,343.72x = 13,838,217,695.08
  5. Step 5: Solve for x
    x = 13,838,217,695.08/125,343.72
  6. Step 6: Final answer
    x = 110,402.16

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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.