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Finding the Fourth Proportional to 172,866.78, 238,556.10 and 93,378.78

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Solution

The fourth proportional to 172,866.78, 238,556.10 and 93,378.78 is: 128,862.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,866.78 : 238,556.10 = 93,378.78 : x
  2. Step 2: Convert to fraction form
    172,866.78/238,556.10 = 93,378.78/x
  3. Step 3: Cross multiply
    172,866.78x = 238,556.10 × 93,378.78
  4. Step 4: Simplify right side
    172,866.78x = 22,276,077,579.56
  5. Step 5: Solve for x
    x = 22,276,077,579.56/172,866.78
  6. Step 6: Final answer
    x = 128,862.69

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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.