Home / 78,476.20-117,714.30-77,180.20

Finding the Fourth Proportional to 78,476.20, 117,714.30 and 77,180.20

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Solution

The fourth proportional to 78,476.20, 117,714.30 and 77,180.20 is: 115,770.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,476.20 : 117,714.30 = 77,180.20 : x
  2. Step 2: Convert to fraction form
    78,476.20/117,714.30 = 77,180.20/x
  3. Step 3: Cross multiply
    78,476.20x = 117,714.30 × 77,180.20
  4. Step 4: Simplify right side
    78,476.20x = 9,085,213,216.86
  5. Step 5: Solve for x
    x = 9,085,213,216.86/78,476.20
  6. Step 6: Final answer
    x = 115,770.30

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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.