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Finding the Fourth Proportional to 155,879.01, 215,114.03 and 84,258.87

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Solution

The fourth proportional to 155,879.01, 215,114.03 and 84,258.87 is: 116,277.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,879.01 : 215,114.03 = 84,258.87 : x
  2. Step 2: Convert to fraction form
    155,879.01/215,114.03 = 84,258.87/x
  3. Step 3: Cross multiply
    155,879.01x = 215,114.03 × 84,258.87
  4. Step 4: Simplify right side
    155,879.01x = 18,125,264,667.65
  5. Step 5: Solve for x
    x = 18,125,264,667.65/155,879.01
  6. Step 6: Final answer
    x = 116,277.78

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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.