Home / 135,436.15-186,851.69-87,715.81

Finding the Fourth Proportional to 135,436.15, 186,851.69 and 87,715.81

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Solution

The fourth proportional to 135,436.15, 186,851.69 and 87,715.81 is: 121,015.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,436.15 : 186,851.69 = 87,715.81 : x
  2. Step 2: Convert to fraction form
    135,436.15/186,851.69 = 87,715.81/x
  3. Step 3: Cross multiply
    135,436.15x = 186,851.69 × 87,715.81
  4. Step 4: Simplify right side
    135,436.15x = 16,389,846,403.96
  5. Step 5: Solve for x
    x = 16,389,846,403.96/135,436.15
  6. Step 6: Final answer
    x = 121,015.31

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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.