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Finding the Fourth Proportional to 172,919.20, 258,860.40 and 162,666.40

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Solution

The fourth proportional to 172,919.20, 258,860.40 and 162,666.40 is: 243,511.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,919.20 : 258,860.40 = 162,666.40 : x
  2. Step 2: Convert to fraction form
    172,919.20/258,860.40 = 162,666.40/x
  3. Step 3: Cross multiply
    172,919.20x = 258,860.40 × 162,666.40
  4. Step 4: Simplify right side
    172,919.20x = 42,107,889,370.56
  5. Step 5: Solve for x
    x = 42,107,889,370.56/172,919.20
  6. Step 6: Final answer
    x = 243,511.94

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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.