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Finding the Fourth Proportional to 125,162.72, 172,731.84 and 71,464.58

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Solution

The fourth proportional to 125,162.72, 172,731.84 and 71,464.58 is: 98,625.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,162.72 : 172,731.84 = 71,464.58 : x
  2. Step 2: Convert to fraction form
    125,162.72/172,731.84 = 71,464.58/x
  3. Step 3: Cross multiply
    125,162.72x = 172,731.84 × 71,464.58
  4. Step 4: Simplify right side
    125,162.72x = 12,344,208,316.31
  5. Step 5: Solve for x
    x = 12,344,208,316.31/125,162.72
  6. Step 6: Final answer
    x = 98,625.28

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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.