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Finding the Fourth Proportional to 84,079.86, 126,128.43 and 48,580.98

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Solution

The fourth proportional to 84,079.86, 126,128.43 and 48,580.98 is: 72,876.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,079.86 : 126,128.43 = 48,580.98 : x
  2. Step 2: Convert to fraction form
    84,079.86/126,128.43 = 48,580.98/x
  3. Step 3: Cross multiply
    84,079.86x = 126,128.43 × 48,580.98
  4. Step 4: Simplify right side
    84,079.86x = 6,127,442,735.26
  5. Step 5: Solve for x
    x = 6,127,442,735.26/84,079.86
  6. Step 6: Final answer
    x = 72,876.46

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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.