Home / 151,921.73-209,609.32-87,387.59

Finding the Fourth Proportional to 151,921.73, 209,609.32 and 87,387.59

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Solution

The fourth proportional to 151,921.73, 209,609.32 and 87,387.59 is: 120,570.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,921.73 : 209,609.32 = 87,387.59 : x
  2. Step 2: Convert to fraction form
    151,921.73/209,609.32 = 87,387.59/x
  3. Step 3: Cross multiply
    151,921.73x = 209,609.32 × 87,387.59
  4. Step 4: Simplify right side
    151,921.73x = 18,317,253,316.34
  5. Step 5: Solve for x
    x = 18,317,253,316.34/151,921.73
  6. Step 6: Final answer
    x = 120,570.33

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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.