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Finding the Fourth Proportional to 71,188.59, 106,781.45 and 21,268.83

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Solution

The fourth proportional to 71,188.59, 106,781.45 and 21,268.83 is: 31,902.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,188.59 : 106,781.45 = 21,268.83 : x
  2. Step 2: Convert to fraction form
    71,188.59/106,781.45 = 21,268.83/x
  3. Step 3: Cross multiply
    71,188.59x = 106,781.45 × 21,268.83
  4. Step 4: Simplify right side
    71,188.59x = 2,271,116,400.86
  5. Step 5: Solve for x
    x = 2,271,116,400.86/71,188.59
  6. Step 6: Final answer
    x = 31,902.81

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1.5x scale

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.