Home / 78,360,062.76-117,542,747.20-20,852,389.28

Finding the Fourth Proportional to 78,360,062.76, 117,542,747.20 and 20,852,389.28

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Solution

The fourth proportional to 78,360,062.76, 117,542,747.20 and 20,852,389.28 is: 31,279,289.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,360,062.76 : 117,542,747.20 = 20,852,389.28 : x
  2. Step 2: Convert to fraction form
    78,360,062.76/117,542,747.20 = 20,852,389.28/x
  3. Step 3: Cross multiply
    78,360,062.76x = 117,542,747.20 × 20,852,389.28
  4. Step 4: Simplify right side
    78,360,062.76x = 2,451,047,121,655,030
  5. Step 5: Solve for x
    x = 2,451,047,121,655,030/78,360,062.76
  6. Step 6: Final answer
    x = 31,279,289.93

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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.