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Finding the Fourth Proportional to 161,706.80, 242,560.20 and 98,721.20

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Solution

The fourth proportional to 161,706.80, 242,560.20 and 98,721.20 is: 148,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,706.80 : 242,560.20 = 98,721.20 : x
  2. Step 2: Convert to fraction form
    161,706.80/242,560.20 = 98,721.20/x
  3. Step 3: Cross multiply
    161,706.80x = 242,560.20 × 98,721.20
  4. Step 4: Simplify right side
    161,706.80x = 23,945,834,016.24
  5. Step 5: Solve for x
    x = 23,945,834,016.24/161,706.80
  6. Step 6: Final answer
    x = 148,081.80

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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.