Home / 78,575.60-108,556.92-72,277.04

Finding the Fourth Proportional to 78,575.60, 108,556.92 and 72,277.04

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Solution

The fourth proportional to 78,575.60, 108,556.92 and 72,277.04 is: 99,855.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,575.60 : 108,556.92 = 72,277.04 : x
  2. Step 2: Convert to fraction form
    78,575.60/108,556.92 = 72,277.04/x
  3. Step 3: Cross multiply
    78,575.60x = 108,556.92 × 72,277.04
  4. Step 4: Simplify right side
    78,575.60x = 7,846,172,849.12
  5. Step 5: Solve for x
    x = 7,846,172,849.12/78,575.60
  6. Step 6: Final answer
    x = 99,855.08

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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.