Home / 78,221.42-117,320.25-25,629.74

Finding the Fourth Proportional to 78,221.42, 117,320.25 and 25,629.74

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Solution

The fourth proportional to 78,221.42, 117,320.25 and 25,629.74 is: 38,440.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,221.42 : 117,320.25 = 25,629.74 : x
  2. Step 2: Convert to fraction form
    78,221.42/117,320.25 = 25,629.74/x
  3. Step 3: Cross multiply
    78,221.42x = 117,320.25 × 25,629.74
  4. Step 4: Simplify right side
    78,221.42x = 3,006,887,504.24
  5. Step 5: Solve for x
    x = 3,006,887,504.24/78,221.42
  6. Step 6: Final answer
    x = 38,440.72

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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.