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Finding the Fourth Proportional to 125,131.65, 172,681.74 and 68,543.97

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Solution

The fourth proportional to 125,131.65, 172,681.74 and 68,543.97 is: 94,590.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,131.65 : 172,681.74 = 68,543.97 : x
  2. Step 2: Convert to fraction form
    125,131.65/172,681.74 = 68,543.97/x
  3. Step 3: Cross multiply
    125,131.65x = 172,681.74 × 68,543.97
  4. Step 4: Simplify right side
    125,131.65x = 11,836,292,006.11
  5. Step 5: Solve for x
    x = 11,836,292,006.11/125,131.65
  6. Step 6: Final answer
    x = 94,590.71

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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.