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Finding the Fourth Proportional to 172,574.39, 258,879.29 and 66,047.95

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Solution

The fourth proportional to 172,574.39, 258,879.29 and 66,047.95 is: 99,078.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,574.39 : 258,879.29 = 66,047.95 : x
  2. Step 2: Convert to fraction form
    172,574.39/258,879.29 = 66,047.95/x
  3. Step 3: Cross multiply
    172,574.39x = 258,879.29 × 66,047.95
  4. Step 4: Simplify right side
    172,574.39x = 17,098,446,071.72
  5. Step 5: Solve for x
    x = 17,098,446,071.72/172,574.39
  6. Step 6: Final answer
    x = 99,078.70

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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.