Home / 78,198.72-117,306.28-25,612.31

Finding the Fourth Proportional to 78,198.72, 117,306.28 and 25,612.31

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Solution

The fourth proportional to 78,198.72, 117,306.28 and 25,612.31 is: 38,421.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,198.72 : 117,306.28 = 25,612.31 : x
  2. Step 2: Convert to fraction form
    78,198.72/117,306.28 = 25,612.31/x
  3. Step 3: Cross multiply
    78,198.72x = 117,306.28 × 25,612.31
  4. Step 4: Simplify right side
    78,198.72x = 3,004,484,221.78
  5. Step 5: Solve for x
    x = 3,004,484,221.78/78,198.72
  6. Step 6: Final answer
    x = 38,421.14

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1.5x scale

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.