Home / 78,360,066.78-117,542,753.22-20,852,393.28

Finding the Fourth Proportional to 78,360,066.78, 117,542,753.22 and 20,852,393.28

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Solution

The fourth proportional to 78,360,066.78, 117,542,753.22 and 20,852,393.28 is: 31,279,295.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,360,066.78 : 117,542,753.22 = 20,852,393.28 : x
  2. Step 2: Convert to fraction form
    78,360,066.78/117,542,753.22 = 20,852,393.28/x
  3. Step 3: Cross multiply
    78,360,066.78x = 117,542,753.22 × 20,852,393.28
  4. Step 4: Simplify right side
    78,360,066.78x = 2,451,047,717,357,426.50
  5. Step 5: Solve for x
    x = 2,451,047,717,357,426.50/78,360,066.78
  6. Step 6: Final answer
    x = 31,279,295.92

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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.