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Finding the Fourth Proportional to 128,059.84, 176,660.76 and 80,295.76

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Solution

The fourth proportional to 128,059.84, 176,660.76 and 80,295.76 is: 110,769.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,059.84 : 176,660.76 = 80,295.76 : x
  2. Step 2: Convert to fraction form
    128,059.84/176,660.76 = 80,295.76/x
  3. Step 3: Cross multiply
    128,059.84x = 176,660.76 × 80,295.76
  4. Step 4: Simplify right side
    128,059.84x = 14,185,109,986.38
  5. Step 5: Solve for x
    x = 14,185,109,986.38/128,059.84
  6. Step 6: Final answer
    x = 110,769.39

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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.