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Finding the Fourth Proportional to 78,851.57, 118,292.92 and 28,932.08

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Solution

The fourth proportional to 78,851.57, 118,292.92 and 28,932.08 is: 43,403.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,851.57 : 118,292.92 = 28,932.08 : x
  2. Step 2: Convert to fraction form
    78,851.57/118,292.92 = 28,932.08/x
  3. Step 3: Cross multiply
    78,851.57x = 118,292.92 × 28,932.08
  4. Step 4: Simplify right side
    78,851.57x = 3,422,459,561.08
  5. Step 5: Solve for x
    x = 3,422,459,561.08/78,851.57
  6. Step 6: Final answer
    x = 43,403.83

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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.