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Finding the Fourth Proportional to 75,121.62, 103,672.80 and 43,292.55

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Solution

The fourth proportional to 75,121.62, 103,672.80 and 43,292.55 is: 59,746.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,121.62 : 103,672.80 = 43,292.55 : x
  2. Step 2: Convert to fraction form
    75,121.62/103,672.80 = 43,292.55/x
  3. Step 3: Cross multiply
    75,121.62x = 103,672.80 × 43,292.55
  4. Step 4: Simplify right side
    75,121.62x = 4,488,259,877.64
  5. Step 5: Solve for x
    x = 4,488,259,877.64/75,121.62
  6. Step 6: Final answer
    x = 59,746.58

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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.