Home / 155,850.09-215,062.34-87,869.49

Finding the Fourth Proportional to 155,850.09, 215,062.34 and 87,869.49

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Solution

The fourth proportional to 155,850.09, 215,062.34 and 87,869.49 is: 121,253.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,850.09 : 215,062.34 = 87,869.49 : x
  2. Step 2: Convert to fraction form
    155,850.09/215,062.34 = 87,869.49/x
  3. Step 3: Cross multiply
    155,850.09x = 215,062.34 × 87,869.49
  4. Step 4: Simplify right side
    155,850.09x = 18,897,417,694.66
  5. Step 5: Solve for x
    x = 18,897,417,694.66/155,850.09
  6. Step 6: Final answer
    x = 121,253.81

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1.5x scale

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.