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Finding the Fourth Proportional to 161,715.80, 242,573.70 and 138,096.20

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Solution

The fourth proportional to 161,715.80, 242,573.70 and 138,096.20 is: 207,144.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,715.80 : 242,573.70 = 138,096.20 : x
  2. Step 2: Convert to fraction form
    161,715.80/242,573.70 = 138,096.20/x
  3. Step 3: Cross multiply
    161,715.80x = 242,573.70 × 138,096.20
  4. Step 4: Simplify right side
    161,715.80x = 33,498,506,189.94
  5. Step 5: Solve for x
    x = 33,498,506,189.94/161,715.80
  6. Step 6: Final answer
    x = 207,144.30

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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.