Home / 155,936.60-215,250.57-121,412.78

Finding the Fourth Proportional to 155,936.60, 215,250.57 and 121,412.78

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Solution

The fourth proportional to 155,936.60, 215,250.57 and 121,412.78 is: 167,594.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,936.60 : 215,250.57 = 121,412.78 : x
  2. Step 2: Convert to fraction form
    155,936.60/215,250.57 = 121,412.78/x
  3. Step 3: Cross multiply
    155,936.60x = 215,250.57 × 121,412.78
  4. Step 4: Simplify right side
    155,936.60x = 26,134,170,100.28
  5. Step 5: Solve for x
    x = 26,134,170,100.28/155,936.60
  6. Step 6: Final answer
    x = 167,594.84

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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.