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Finding the Fourth Proportional to 172,900, 238,602 and 93,412

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Solution

The fourth proportional to 172,900, 238,602 and 93,412 is: 128,908.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,900 : 238,602 = 93,412 : x
  2. Step 2: Convert to fraction form
    172,900/238,602 = 93,412/x
  3. Step 3: Cross multiply
    172,900x = 238,602 × 93,412
  4. Step 4: Simplify right side
    172,900x = 22,288,290,024
  5. Step 5: Solve for x
    x = 22,288,290,024/172,900
  6. Step 6: Final answer
    x = 128,908.56

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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.