Home / 78,240.16-117,359.76-25,649.28

Finding the Fourth Proportional to 78,240.16, 117,359.76 and 25,649.28

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Solution

The fourth proportional to 78,240.16, 117,359.76 and 25,649.28 is: 38,473.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,240.16 : 117,359.76 = 25,649.28 : x
  2. Step 2: Convert to fraction form
    78,240.16/117,359.76 = 25,649.28/x
  3. Step 3: Cross multiply
    78,240.16x = 117,359.76 × 25,649.28
  4. Step 4: Simplify right side
    78,240.16x = 3,010,193,344.97
  5. Step 5: Solve for x
    x = 3,010,193,344.97/78,240.16
  6. Step 6: Final answer
    x = 38,473.76

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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.