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Finding the Fourth Proportional to 80,978.60, 121,419.30 and 41,612.60

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Solution

The fourth proportional to 80,978.60, 121,419.30 and 41,612.60 is: 62,393.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,978.60 : 121,419.30 = 41,612.60 : x
  2. Step 2: Convert to fraction form
    80,978.60/121,419.30 = 41,612.60/x
  3. Step 3: Cross multiply
    80,978.60x = 121,419.30 × 41,612.60
  4. Step 4: Simplify right side
    80,978.60x = 5,052,572,763.18
  5. Step 5: Solve for x
    x = 5,052,572,763.18/80,978.60
  6. Step 6: Final answer
    x = 62,393.93

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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.