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Finding the Fourth Proportional to 155,820, 215,027.04 and 87,840.96

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Solution

The fourth proportional to 155,820, 215,027.04 and 87,840.96 is: 121,217.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,820 : 215,027.04 = 87,840.96 : x
  2. Step 2: Convert to fraction form
    155,820/215,027.04 = 87,840.96/x
  3. Step 3: Cross multiply
    155,820x = 215,027.04 × 87,840.96
  4. Step 4: Simplify right side
    155,820x = 18,888,181,619.56
  5. Step 5: Solve for x
    x = 18,888,181,619.56/155,820
  6. Step 6: Final answer
    x = 121,217.95

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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.