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Finding the Fourth Proportional to 78,883.86, 118,137.24 and 45,502.74

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Solution

The fourth proportional to 78,883.86, 118,137.24 and 45,502.74 is: 68,145.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,883.86 : 118,137.24 = 45,502.74 : x
  2. Step 2: Convert to fraction form
    78,883.86/118,137.24 = 45,502.74/x
  3. Step 3: Cross multiply
    78,883.86x = 118,137.24 × 45,502.74
  4. Step 4: Simplify right side
    78,883.86x = 5,375,568,116.04
  5. Step 5: Solve for x
    x = 5,375,568,116.04/78,883.86
  6. Step 6: Final answer
    x = 68,145.35

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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.