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Finding the Fourth Proportional to 161,863.80, 242,795.70 and 90,713.40

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Solution

The fourth proportional to 161,863.80, 242,795.70 and 90,713.40 is: 136,070.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,863.80 : 242,795.70 = 90,713.40 : x
  2. Step 2: Convert to fraction form
    161,863.80/242,795.70 = 90,713.40/x
  3. Step 3: Cross multiply
    161,863.80x = 242,795.70 × 90,713.40
  4. Step 4: Simplify right side
    161,863.80x = 22,024,823,452.38
  5. Step 5: Solve for x
    x = 22,024,823,452.38/161,863.80
  6. Step 6: Final answer
    x = 136,070.10

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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.