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Finding the Fourth Proportional to 172,570.80, 258,702.30 and 67,365.30

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Solution

The fourth proportional to 172,570.80, 258,702.30 and 67,365.30 is: 100,987.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,570.80 : 258,702.30 = 67,365.30 : x
  2. Step 2: Convert to fraction form
    172,570.80/258,702.30 = 67,365.30/x
  3. Step 3: Cross multiply
    172,570.80x = 258,702.30 × 67,365.30
  4. Step 4: Simplify right side
    172,570.80x = 17,427,558,050.19
  5. Step 5: Solve for x
    x = 17,427,558,050.19/172,570.80
  6. Step 6: Final answer
    x = 100,987.87

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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.