Home / 136,827.05-188,845.89-81,639.92

Finding the Fourth Proportional to 136,827.05, 188,845.89 and 81,639.92

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Solution

The fourth proportional to 136,827.05, 188,845.89 and 81,639.92 is: 112,677.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,827.05 : 188,845.89 = 81,639.92 : x
  2. Step 2: Convert to fraction form
    136,827.05/188,845.89 = 81,639.92/x
  3. Step 3: Cross multiply
    136,827.05x = 188,845.89 × 81,639.92
  4. Step 4: Simplify right side
    136,827.05x = 15,417,363,351.93
  5. Step 5: Solve for x
    x = 15,417,363,351.93/136,827.05
  6. Step 6: Final answer
    x = 112,677.74

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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.