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Finding the Fourth Proportional to 78,697.60, 118,035.60 and 26,101.60

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Solution

The fourth proportional to 78,697.60, 118,035.60 and 26,101.60 is: 39,148.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,697.60 : 118,035.60 = 26,101.60 : x
  2. Step 2: Convert to fraction form
    78,697.60/118,035.60 = 26,101.60/x
  3. Step 3: Cross multiply
    78,697.60x = 118,035.60 × 26,101.60
  4. Step 4: Simplify right side
    78,697.60x = 3,080,918,016.96
  5. Step 5: Solve for x
    x = 3,080,918,016.96/78,697.60
  6. Step 6: Final answer
    x = 39,148.82

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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.