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Finding the Fourth Proportional to 172,357.20, 258,535.80 and 45,997.20

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Solution

The fourth proportional to 172,357.20, 258,535.80 and 45,997.20 is: 68,995.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,357.20 : 258,535.80 = 45,997.20 : x
  2. Step 2: Convert to fraction form
    172,357.20/258,535.80 = 45,997.20/x
  3. Step 3: Cross multiply
    172,357.20x = 258,535.80 × 45,997.20
  4. Step 4: Simplify right side
    172,357.20x = 11,891,922,899.76
  5. Step 5: Solve for x
    x = 11,891,922,899.76/172,357.20
  6. Step 6: Final answer
    x = 68,995.80

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1.5x scale

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.