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Finding the Fourth Proportional to 81,988.76, 122,970.90 and 22,818.26

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Solution

The fourth proportional to 81,988.76, 122,970.90 and 22,818.26 is: 34,223.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,988.76 : 122,970.90 = 22,818.26 : x
  2. Step 2: Convert to fraction form
    81,988.76/122,970.90 = 22,818.26/x
  3. Step 3: Cross multiply
    81,988.76x = 122,970.90 × 22,818.26
  4. Step 4: Simplify right side
    81,988.76x = 2,805,981,968.63
  5. Step 5: Solve for x
    x = 2,805,981,968.63/81,988.76
  6. Step 6: Final answer
    x = 34,223.98

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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.