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Finding the Fourth Proportional to 78,765.60, 118,159.20 and 26,169.60

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Solution

The fourth proportional to 78,765.60, 118,159.20 and 26,169.60 is: 39,257.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,765.60 : 118,159.20 = 26,169.60 : x
  2. Step 2: Convert to fraction form
    78,765.60/118,159.20 = 26,169.60/x
  3. Step 3: Cross multiply
    78,765.60x = 118,159.20 × 26,169.60
  4. Step 4: Simplify right side
    78,765.60x = 3,092,179,000.32
  5. Step 5: Solve for x
    x = 3,092,179,000.32/78,765.60
  6. Step 6: Final answer
    x = 39,257.99

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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.