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Finding the Fourth Proportional to 172,981, 238,509.30 and 122,002.12

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Solution

The fourth proportional to 172,981, 238,509.30 and 122,002.12 is: 168,218.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,981 : 238,509.30 = 122,002.12 : x
  2. Step 2: Convert to fraction form
    172,981/238,509.30 = 122,002.12/x
  3. Step 3: Cross multiply
    172,981x = 238,509.30 × 122,002.12
  4. Step 4: Simplify right side
    172,981x = 29,098,640,239.72
  5. Step 5: Solve for x
    x = 29,098,640,239.72/172,981
  6. Step 6: Final answer
    x = 168,218.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.