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Finding the Fourth Proportional to 168,987.10, 253,480.65 and 112,999.90

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Solution

The fourth proportional to 168,987.10, 253,480.65 and 112,999.90 is: 169,499.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,987.10 : 253,480.65 = 112,999.90 : x
  2. Step 2: Convert to fraction form
    168,987.10/253,480.65 = 112,999.90/x
  3. Step 3: Cross multiply
    168,987.10x = 253,480.65 × 112,999.90
  4. Step 4: Simplify right side
    168,987.10x = 28,643,288,101.94
  5. Step 5: Solve for x
    x = 28,643,288,101.94/168,987.10
  6. Step 6: Final answer
    x = 169,499.85

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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.