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Finding the Fourth Proportional to 121,036.70, 181,555.05 and 87,599.90

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Solution

The fourth proportional to 121,036.70, 181,555.05 and 87,599.90 is: 131,399.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,036.70 : 181,555.05 = 87,599.90 : x
  2. Step 2: Convert to fraction form
    121,036.70/181,555.05 = 87,599.90/x
  3. Step 3: Cross multiply
    121,036.70x = 181,555.05 × 87,599.90
  4. Step 4: Simplify right side
    121,036.70x = 15,904,204,224.50
  5. Step 5: Solve for x
    x = 15,904,204,224.50/121,036.70
  6. Step 6: Final answer
    x = 131,399.85

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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.