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Finding the Third Proportional to 99,574 and 155,421

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Solution

The third proportional to 99,574 and 155,421 is: 242,590.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,574 : 155,421 = 155,421 : x
  2. Step 2: Convert to fraction form
    99,574/155,421 = 155,421/x
  3. Step 3: Cross multiply
    99,574x = 155,421 × 155,421
  4. Step 4: Simplify right side
    99,574x = 24,155,687,241
  5. Step 5: Solve for x
    x = 24,155,687,241/99,574
  6. Step 6: Final answer
    x = 242,590.31

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.