Home / 128,686.39-177,597.28-82,787.02

Finding the Fourth Proportional to 128,686.39, 177,597.28 and 82,787.02

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Solution

The fourth proportional to 128,686.39, 177,597.28 and 82,787.02 is: 114,252.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,686.39 : 177,597.28 = 82,787.02 : x
  2. Step 2: Convert to fraction form
    128,686.39/177,597.28 = 82,787.02/x
  3. Step 3: Cross multiply
    128,686.39x = 177,597.28 × 82,787.02
  4. Step 4: Simplify right side
    128,686.39x = 14,702,749,571.31
  5. Step 5: Solve for x
    x = 14,702,749,571.31/128,686.39
  6. Step 6: Final answer
    x = 114,252.56

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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.