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Finding the Fourth Proportional to 172,965.20, 259,246.20 and 79,480.40

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Solution

The fourth proportional to 172,965.20, 259,246.20 and 79,480.40 is: 119,127.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,965.20 : 259,246.20 = 79,480.40 : x
  2. Step 2: Convert to fraction form
    172,965.20/259,246.20 = 79,480.40/x
  3. Step 3: Cross multiply
    172,965.20x = 259,246.20 × 79,480.40
  4. Step 4: Simplify right side
    172,965.20x = 20,604,991,674.48
  5. Step 5: Solve for x
    x = 20,604,991,674.48/172,965.20
  6. Step 6: Final answer
    x = 119,127.96

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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.