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Finding the Fourth Proportional to 81,044.62, 121,621.24 and 28,454.26

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Solution

The fourth proportional to 81,044.62, 121,621.24 and 28,454.26 is: 42,700.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,044.62 : 121,621.24 = 28,454.26 : x
  2. Step 2: Convert to fraction form
    81,044.62/121,621.24 = 28,454.26/x
  3. Step 3: Cross multiply
    81,044.62x = 121,621.24 × 28,454.26
  4. Step 4: Simplify right side
    81,044.62x = 3,460,642,384.48
  5. Step 5: Solve for x
    x = 3,460,642,384.48/81,044.62
  6. Step 6: Final answer
    x = 42,700.46

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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.