Home / 78,301,085.20-117,451,627.80-71,120,726.80

Finding the Fourth Proportional to 78,301,085.20, 117,451,627.80 and 71,120,726.80

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Solution

The fourth proportional to 78,301,085.20, 117,451,627.80 and 71,120,726.80 is: 106,681,090.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,301,085.20 : 117,451,627.80 = 71,120,726.80 : x
  2. Step 2: Convert to fraction form
    78,301,085.20/117,451,627.80 = 71,120,726.80/x
  3. Step 3: Cross multiply
    78,301,085.20x = 117,451,627.80 × 71,120,726.80
  4. Step 4: Simplify right side
    78,301,085.20x = 8,353,245,132,979,084
  5. Step 5: Solve for x
    x = 8,353,245,132,979,084/78,301,085.20
  6. Step 6: Final answer
    x = 106,681,090.20

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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.