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Finding the Fourth Proportional to 147,659.60, 221,489.40 and 68,781.80

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Solution

The fourth proportional to 147,659.60, 221,489.40 and 68,781.80 is: 103,172.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,659.60 : 221,489.40 = 68,781.80 : x
  2. Step 2: Convert to fraction form
    147,659.60/221,489.40 = 68,781.80/x
  3. Step 3: Cross multiply
    147,659.60x = 221,489.40 × 68,781.80
  4. Step 4: Simplify right side
    147,659.60x = 15,234,439,612.92
  5. Step 5: Solve for x
    x = 15,234,439,612.92/147,659.60
  6. Step 6: Final answer
    x = 103,172.70

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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.