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Finding the Fourth Proportional to 81,052.66, 121,578.63 and 21,894.40

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Solution

The fourth proportional to 81,052.66, 121,578.63 and 21,894.40 is: 32,841.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,052.66 : 121,578.63 = 21,894.40 : x
  2. Step 2: Convert to fraction form
    81,052.66/121,578.63 = 21,894.40/x
  3. Step 3: Cross multiply
    81,052.66x = 121,578.63 × 21,894.40
  4. Step 4: Simplify right side
    81,052.66x = 2,661,891,156.67
  5. Step 5: Solve for x
    x = 2,661,891,156.67/81,052.66
  6. Step 6: Final answer
    x = 32,841.50

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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.