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Finding the Fourth Proportional to 144,922.80, 217,384.20 and 81,937.20

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Solution

The fourth proportional to 144,922.80, 217,384.20 and 81,937.20 is: 122,905.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,922.80 : 217,384.20 = 81,937.20 : x
  2. Step 2: Convert to fraction form
    144,922.80/217,384.20 = 81,937.20/x
  3. Step 3: Cross multiply
    144,922.80x = 217,384.20 × 81,937.20
  4. Step 4: Simplify right side
    144,922.80x = 17,811,852,672.24
  5. Step 5: Solve for x
    x = 17,811,852,672.24/144,922.80
  6. Step 6: Final answer
    x = 122,905.80

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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.