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Finding the Fourth Proportional to 172,342.10, 258,002.85 and 128,164.70

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Solution

The fourth proportional to 172,342.10, 258,002.85 and 128,164.70 is: 191,867.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,342.10 : 258,002.85 = 128,164.70 : x
  2. Step 2: Convert to fraction form
    172,342.10/258,002.85 = 128,164.70/x
  3. Step 3: Cross multiply
    172,342.10x = 258,002.85 × 128,164.70
  4. Step 4: Simplify right side
    172,342.10x = 33,066,857,869.40
  5. Step 5: Solve for x
    x = 33,066,857,869.40/172,342.10
  6. Step 6: Final answer
    x = 191,867.56

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1.5x scale

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.