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Finding the Fourth Proportional to 125,207.90, 172,846.79 and 71,482.56

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Solution

The fourth proportional to 125,207.90, 172,846.79 and 71,482.56 is: 98,680.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,207.90 : 172,846.79 = 71,482.56 : x
  2. Step 2: Convert to fraction form
    125,207.90/172,846.79 = 71,482.56/x
  3. Step 3: Cross multiply
    125,207.90x = 172,846.79 × 71,482.56
  4. Step 4: Simplify right side
    125,207.90x = 12,355,531,036.98
  5. Step 5: Solve for x
    x = 12,355,531,036.98/125,207.90
  6. Step 6: Final answer
    x = 98,680.12

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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.