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Finding the Fourth Proportional to 172,572.64, 258,372.32 and 91,335.65

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Solution

The fourth proportional to 172,572.64, 258,372.32 and 91,335.65 is: 136,745.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,572.64 : 258,372.32 = 91,335.65 : x
  2. Step 2: Convert to fraction form
    172,572.64/258,372.32 = 91,335.65/x
  3. Step 3: Cross multiply
    172,572.64x = 258,372.32 × 91,335.65
  4. Step 4: Simplify right side
    172,572.64x = 23,598,602,040.67
  5. Step 5: Solve for x
    x = 23,598,602,040.67/172,572.64
  6. Step 6: Final answer
    x = 136,745.91

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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.