Home / 81,029-121,542.96-21,870.66

Finding the Fourth Proportional to 81,029, 121,542.96 and 21,870.66

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Solution

The fourth proportional to 81,029, 121,542.96 and 21,870.66 is: 32,805.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,029 : 121,542.96 = 21,870.66 : x
  2. Step 2: Convert to fraction form
    81,029/121,542.96 = 21,870.66/x
  3. Step 3: Cross multiply
    81,029x = 121,542.96 × 21,870.66
  4. Step 4: Simplify right side
    81,029x = 2,658,224,753.55
  5. Step 5: Solve for x
    x = 2,658,224,753.55/81,029
  6. Step 6: Final answer
    x = 32,805.84

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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.