Home / 151,740.12-209,385.12-87,196.29

Finding the Fourth Proportional to 151,740.12, 209,385.12 and 87,196.29

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Solution

The fourth proportional to 151,740.12, 209,385.12 and 87,196.29 is: 120,321.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,740.12 : 209,385.12 = 87,196.29 : x
  2. Step 2: Convert to fraction form
    151,740.12/209,385.12 = 87,196.29/x
  3. Step 3: Cross multiply
    151,740.12x = 209,385.12 × 87,196.29
  4. Step 4: Simplify right side
    151,740.12x = 18,257,605,645.20
  5. Step 5: Solve for x
    x = 18,257,605,645.20/151,740.12
  6. Step 6: Final answer
    x = 120,321.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.