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Finding the Fourth Proportional to 72,805.32, 109,207.90 and 22,889.78

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Solution

The fourth proportional to 72,805.32, 109,207.90 and 22,889.78 is: 34,334.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,805.32 : 109,207.90 = 22,889.78 : x
  2. Step 2: Convert to fraction form
    72,805.32/109,207.90 = 22,889.78/x
  3. Step 3: Cross multiply
    72,805.32x = 109,207.90 × 22,889.78
  4. Step 4: Simplify right side
    72,805.32x = 2,499,744,805.26
  5. Step 5: Solve for x
    x = 2,499,744,805.26/72,805.32
  6. Step 6: Final answer
    x = 34,334.64

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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.