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Finding the Fourth Proportional to 125,212.15, 172,759.15 and 71,486.47

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Solution

The fourth proportional to 125,212.15, 172,759.15 and 71,486.47 is: 98,632.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,212.15 : 172,759.15 = 71,486.47 : x
  2. Step 2: Convert to fraction form
    125,212.15/172,759.15 = 71,486.47/x
  3. Step 3: Cross multiply
    125,212.15x = 172,759.15 × 71,486.47
  4. Step 4: Simplify right side
    125,212.15x = 12,349,941,696.90
  5. Step 5: Solve for x
    x = 12,349,941,696.90/125,212.15
  6. Step 6: Final answer
    x = 98,632.13

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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.