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Finding the Fourth Proportional to 155,865.60, 215,094.50 and 84,245.61

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Solution

The fourth proportional to 155,865.60, 215,094.50 and 84,245.61 is: 116,258.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,865.60 : 215,094.50 = 84,245.61 : x
  2. Step 2: Convert to fraction form
    155,865.60/215,094.50 = 84,245.61/x
  3. Step 3: Cross multiply
    155,865.60x = 215,094.50 × 84,245.61
  4. Step 4: Simplify right side
    155,865.60x = 18,120,767,360.15
  5. Step 5: Solve for x
    x = 18,120,767,360.15/155,865.60
  6. Step 6: Final answer
    x = 116,258.93

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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.