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Finding the Fourth Proportional to 125,131.55, 172,681.61 and 68,543.87

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Solution

The fourth proportional to 125,131.55, 172,681.61 and 68,543.87 is: 94,590.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,131.55 : 172,681.61 = 68,543.87 : x
  2. Step 2: Convert to fraction form
    125,131.55/172,681.61 = 68,543.87/x
  3. Step 3: Cross multiply
    125,131.55x = 172,681.61 × 68,543.87
  4. Step 4: Simplify right side
    125,131.55x = 11,836,265,827.23
  5. Step 5: Solve for x
    x = 11,836,265,827.23/125,131.55
  6. Step 6: Final answer
    x = 94,590.58

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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.