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Finding the Fourth Proportional to 80,480.63, 120,721.62 and 30,547.32

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Solution

The fourth proportional to 80,480.63, 120,721.62 and 30,547.32 is: 45,821.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,480.63 : 120,721.62 = 30,547.32 : x
  2. Step 2: Convert to fraction form
    80,480.63/120,721.62 = 30,547.32/x
  3. Step 3: Cross multiply
    80,480.63x = 120,721.62 × 30,547.32
  4. Step 4: Simplify right side
    80,480.63x = 3,687,721,957.06
  5. Step 5: Solve for x
    x = 3,687,721,957.06/80,480.63
  6. Step 6: Final answer
    x = 45,821.24

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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.