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Finding the Fourth Proportional to 80,618.59, 110,999.50 and 73,145.19

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Solution

The fourth proportional to 80,618.59, 110,999.50 and 73,145.19 is: 100,709.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,618.59 : 110,999.50 = 73,145.19 : x
  2. Step 2: Convert to fraction form
    80,618.59/110,999.50 = 73,145.19/x
  3. Step 3: Cross multiply
    80,618.59x = 110,999.50 × 73,145.19
  4. Step 4: Simplify right side
    80,618.59x = 8,119,079,750.79
  5. Step 5: Solve for x
    x = 8,119,079,750.79/80,618.59
  6. Step 6: Final answer
    x = 100,709.77

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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.