Home / 138,393.18-207,580.05-79,042.86

Finding the Fourth Proportional to 138,393.18, 207,580.05 and 79,042.86

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Solution

The fourth proportional to 138,393.18, 207,580.05 and 79,042.86 is: 118,558.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,393.18 : 207,580.05 = 79,042.86 : x
  2. Step 2: Convert to fraction form
    138,393.18/207,580.05 = 79,042.86/x
  3. Step 3: Cross multiply
    138,393.18x = 207,580.05 × 79,042.86
  4. Step 4: Simplify right side
    138,393.18x = 16,407,720,830.94
  5. Step 5: Solve for x
    x = 16,407,720,830.94/138,393.18
  6. Step 6: Final answer
    x = 118,558.74

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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.