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Finding the Fourth Proportional to 172,886.48, 259,432.44 and 74,390.48

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Solution

The fourth proportional to 172,886.48, 259,432.44 and 74,390.48 is: 111,629.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,886.48 : 259,432.44 = 74,390.48 : x
  2. Step 2: Convert to fraction form
    172,886.48/259,432.44 = 74,390.48/x
  3. Step 3: Cross multiply
    172,886.48x = 259,432.44 × 74,390.48
  4. Step 4: Simplify right side
    172,886.48x = 19,299,303,739.17
  5. Step 5: Solve for x
    x = 19,299,303,739.17/172,886.48
  6. Step 6: Final answer
    x = 111,629.92

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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.