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Finding the Fourth Proportional to 159,938.20, 240,101.70 and 81,011.80

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Solution

The fourth proportional to 159,938.20, 240,101.70 and 81,011.80 is: 121,616.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,938.20 : 240,101.70 = 81,011.80 : x
  2. Step 2: Convert to fraction form
    159,938.20/240,101.70 = 81,011.80/x
  3. Step 3: Cross multiply
    159,938.20x = 240,101.70 × 81,011.80
  4. Step 4: Simplify right side
    159,938.20x = 19,451,070,900.06
  5. Step 5: Solve for x
    x = 19,451,070,900.06/159,938.20
  6. Step 6: Final answer
    x = 121,616.17

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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.