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Finding the Fourth Proportional to 73,089.60, 100,863.96 and 39,555.60

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Solution

The fourth proportional to 73,089.60, 100,863.96 and 39,555.60 is: 54,586.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,089.60 : 100,863.96 = 39,555.60 : x
  2. Step 2: Convert to fraction form
    73,089.60/100,863.96 = 39,555.60/x
  3. Step 3: Cross multiply
    73,089.60x = 100,863.96 × 39,555.60
  4. Step 4: Simplify right side
    73,089.60x = 3,989,734,456.18
  5. Step 5: Solve for x
    x = 3,989,734,456.18/73,089.60
  6. Step 6: Final answer
    x = 54,586.90

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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.