Home / 78,385.32-117,534.24-25,780.68

Finding the Fourth Proportional to 78,385.32, 117,534.24 and 25,780.68

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Solution

The fourth proportional to 78,385.32, 117,534.24 and 25,780.68 is: 38,656.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,385.32 : 117,534.24 = 25,780.68 : x
  2. Step 2: Convert to fraction form
    78,385.32/117,534.24 = 25,780.68/x
  3. Step 3: Cross multiply
    78,385.32x = 117,534.24 × 25,780.68
  4. Step 4: Simplify right side
    78,385.32x = 3,030,112,630.48
  5. Step 5: Solve for x
    x = 3,030,112,630.48/78,385.32
  6. Step 6: Final answer
    x = 38,656.63

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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.