Home / 172,434.30-258,651.45-72,707.10

Finding the Fourth Proportional to 172,434.30, 258,651.45 and 72,707.10

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Solution

The fourth proportional to 172,434.30, 258,651.45 and 72,707.10 is: 109,060.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,434.30 : 258,651.45 = 72,707.10 : x
  2. Step 2: Convert to fraction form
    172,434.30/258,651.45 = 72,707.10/x
  3. Step 3: Cross multiply
    172,434.30x = 258,651.45 × 72,707.10
  4. Step 4: Simplify right side
    172,434.30x = 18,805,796,840.30
  5. Step 5: Solve for x
    x = 18,805,796,840.30/172,434.30
  6. Step 6: Final answer
    x = 109,060.65

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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.