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Finding the Fourth Proportional to 112,169.80, 168,027.90 and 69,920.20

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Solution

The fourth proportional to 112,169.80, 168,027.90 and 69,920.20 is: 104,738.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,169.80 : 168,027.90 = 69,920.20 : x
  2. Step 2: Convert to fraction form
    112,169.80/168,027.90 = 69,920.20/x
  3. Step 3: Cross multiply
    112,169.80x = 168,027.90 × 69,920.20
  4. Step 4: Simplify right side
    112,169.80x = 11,748,544,373.58
  5. Step 5: Solve for x
    x = 11,748,544,373.58/112,169.80
  6. Step 6: Final answer
    x = 104,738.93

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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.