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Finding the Fourth Proportional to 80,479.16, 120,837.24 and 45,009.97

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Solution

The fourth proportional to 80,479.16, 120,837.24 and 45,009.97 is: 67,581.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,479.16 : 120,837.24 = 45,009.97 : x
  2. Step 2: Convert to fraction form
    80,479.16/120,837.24 = 45,009.97/x
  3. Step 3: Cross multiply
    80,479.16x = 120,837.24 × 45,009.97
  4. Step 4: Simplify right side
    80,479.16x = 5,438,880,547.28
  5. Step 5: Solve for x
    x = 5,438,880,547.28/80,479.16
  6. Step 6: Final answer
    x = 67,581.23

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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.