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Finding the Fourth Proportional to 78,880.60, 118,337.10 and 26,327.80

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Solution

The fourth proportional to 78,880.60, 118,337.10 and 26,327.80 is: 39,497.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,880.60 : 118,337.10 = 26,327.80 : x
  2. Step 2: Convert to fraction form
    78,880.60/118,337.10 = 26,327.80/x
  3. Step 3: Cross multiply
    78,880.60x = 118,337.10 × 26,327.80
  4. Step 4: Simplify right side
    78,880.60x = 3,115,555,501.38
  5. Step 5: Solve for x
    x = 3,115,555,501.38/78,880.60
  6. Step 6: Final answer
    x = 39,497.11

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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.