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Finding the Fourth Proportional to 125,163.91, 172,700.31 and 71,466.40

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Solution

The fourth proportional to 125,163.91, 172,700.31 and 71,466.40 is: 98,608.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,163.91 : 172,700.31 = 71,466.40 : x
  2. Step 2: Convert to fraction form
    125,163.91/172,700.31 = 71,466.40/x
  3. Step 3: Cross multiply
    125,163.91x = 172,700.31 × 71,466.40
  4. Step 4: Simplify right side
    125,163.91x = 12,342,269,434.58
  5. Step 5: Solve for x
    x = 12,342,269,434.58/125,163.91
  6. Step 6: Final answer
    x = 98,608.85

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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.