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Finding the Fourth Proportional to 172,392.28, 258,673.16 and 77,687.88

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Solution

The fourth proportional to 172,392.28, 258,673.16 and 77,687.88 is: 116,570.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,392.28 : 258,673.16 = 77,687.88 : x
  2. Step 2: Convert to fraction form
    172,392.28/258,673.16 = 77,687.88/x
  3. Step 3: Cross multiply
    172,392.28x = 258,673.16 × 77,687.88
  4. Step 4: Simplify right side
    172,392.28x = 20,095,769,413.30
  5. Step 5: Solve for x
    x = 20,095,769,413.30/172,392.28
  6. Step 6: Final answer
    x = 116,570.01

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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.