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Finding the Fourth Proportional to 40,547.20, 60,820.80 and 28,081.30

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Solution

The fourth proportional to 40,547.20, 60,820.80 and 28,081.30 is: 42,121.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,547.20 : 60,820.80 = 28,081.30 : x
  2. Step 2: Convert to fraction form
    40,547.20/60,820.80 = 28,081.30/x
  3. Step 3: Cross multiply
    40,547.20x = 60,820.80 × 28,081.30
  4. Step 4: Simplify right side
    40,547.20x = 1,707,927,131.04
  5. Step 5: Solve for x
    x = 1,707,927,131.04/40,547.20
  6. Step 6: Final answer
    x = 42,121.95

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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.