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Finding the Fourth Proportional to 155,852.60, 215,065.78 and 87,872

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Solution

The fourth proportional to 155,852.60, 215,065.78 and 87,872 is: 121,257.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,852.60 : 215,065.78 = 87,872 : x
  2. Step 2: Convert to fraction form
    155,852.60/215,065.78 = 87,872/x
  3. Step 3: Cross multiply
    155,852.60x = 215,065.78 × 87,872
  4. Step 4: Simplify right side
    155,852.60x = 18,898,260,220.16
  5. Step 5: Solve for x
    x = 18,898,260,220.16/155,852.60
  6. Step 6: Final answer
    x = 121,257.27

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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.