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Finding the Fourth Proportional to 172,573.64, 258,373.81 and 91,336.65

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Solution

The fourth proportional to 172,573.64, 258,373.81 and 91,336.65 is: 136,747.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,573.64 : 258,373.81 = 91,336.65 : x
  2. Step 2: Convert to fraction form
    172,573.64/258,373.81 = 91,336.65/x
  3. Step 3: Cross multiply
    172,573.64x = 258,373.81 × 91,336.65
  4. Step 4: Simplify right side
    172,573.64x = 23,598,998,253.14
  5. Step 5: Solve for x
    x = 23,598,998,253.14/172,573.64
  6. Step 6: Final answer
    x = 136,747.41

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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.