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Finding the Fourth Proportional to 78,988.80, 118,530.03 and 29,103.92

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Solution

The fourth proportional to 78,988.80, 118,530.03 and 29,103.92 is: 43,673.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,988.80 : 118,530.03 = 29,103.92 : x
  2. Step 2: Convert to fraction form
    78,988.80/118,530.03 = 29,103.92/x
  3. Step 3: Cross multiply
    78,988.80x = 118,530.03 × 29,103.92
  4. Step 4: Simplify right side
    78,988.80x = 3,449,687,918.07
  5. Step 5: Solve for x
    x = 3,449,687,918.07/78,988.80
  6. Step 6: Final answer
    x = 43,673.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.