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Finding the Fourth Proportional to 73,909.32, 101,994.85 and 39,917.80

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Solution

The fourth proportional to 73,909.32, 101,994.85 and 39,917.80 is: 55,086.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,909.32 : 101,994.85 = 39,917.80 : x
  2. Step 2: Convert to fraction form
    73,909.32/101,994.85 = 39,917.80/x
  3. Step 3: Cross multiply
    73,909.32x = 101,994.85 × 39,917.80
  4. Step 4: Simplify right side
    73,909.32x = 4,071,409,832.75
  5. Step 5: Solve for x
    x = 4,071,409,832.75/73,909.32
  6. Step 6: Final answer
    x = 55,086.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.