Home / 136,826.55-188,845.20-81,639.42

Finding the Fourth Proportional to 136,826.55, 188,845.20 and 81,639.42

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Solution

The fourth proportional to 136,826.55, 188,845.20 and 81,639.42 is: 112,677.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,826.55 : 188,845.20 = 81,639.42 : x
  2. Step 2: Convert to fraction form
    136,826.55/188,845.20 = 81,639.42/x
  3. Step 3: Cross multiply
    136,826.55x = 188,845.20 × 81,639.42
  4. Step 4: Simplify right side
    136,826.55x = 15,417,212,597.78
  5. Step 5: Solve for x
    x = 15,417,212,597.78/136,826.55
  6. Step 6: Final answer
    x = 112,677.05

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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.