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Finding the Fourth Proportional to 172,574.15, 258,374.57 and 91,337.15

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Solution

The fourth proportional to 172,574.15, 258,374.57 and 91,337.15 is: 136,748.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,574.15 : 258,374.57 = 91,337.15 : x
  2. Step 2: Convert to fraction form
    172,574.15/258,374.57 = 91,337.15/x
  3. Step 3: Cross multiply
    172,574.15x = 258,374.57 × 91,337.15
  4. Step 4: Simplify right side
    172,574.15x = 23,599,195,107.72
  5. Step 5: Solve for x
    x = 23,599,195,107.72/172,574.15
  6. Step 6: Final answer
    x = 136,748.15

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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.