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Finding the Fourth Proportional to 155,863.31, 215,087.04 and 87,879.68

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Solution

The fourth proportional to 155,863.31, 215,087.04 and 87,879.68 is: 121,271.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,863.31 : 215,087.04 = 87,879.68 : x
  2. Step 2: Convert to fraction form
    155,863.31/215,087.04 = 87,879.68/x
  3. Step 3: Cross multiply
    155,863.31x = 215,087.04 × 87,879.68
  4. Step 4: Simplify right side
    155,863.31x = 18,901,780,247.35
  5. Step 5: Solve for x
    x = 18,901,780,247.35/155,863.31
  6. Step 6: Final answer
    x = 121,271.52

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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.