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Finding the Fourth Proportional to 172,684.80, 258,950.40 and 79,219.20

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Solution

The fourth proportional to 172,684.80, 258,950.40 and 79,219.20 is: 118,793.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,684.80 : 258,950.40 = 79,219.20 : x
  2. Step 2: Convert to fraction form
    172,684.80/258,950.40 = 79,219.20/x
  3. Step 3: Cross multiply
    172,684.80x = 258,950.40 × 79,219.20
  4. Step 4: Simplify right side
    172,684.80x = 20,513,843,527.68
  5. Step 5: Solve for x
    x = 20,513,843,527.68/172,684.80
  6. Step 6: Final answer
    x = 118,793.57

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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.