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Finding the Fourth Proportional to 128,846.73, 177,888.24 and 85,886.76

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Solution

The fourth proportional to 128,846.73, 177,888.24 and 85,886.76 is: 118,576.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,846.73 : 177,888.24 = 85,886.76 : x
  2. Step 2: Convert to fraction form
    128,846.73/177,888.24 = 85,886.76/x
  3. Step 3: Cross multiply
    128,846.73x = 177,888.24 × 85,886.76
  4. Step 4: Simplify right side
    128,846.73x = 15,278,244,575.70
  5. Step 5: Solve for x
    x = 15,278,244,575.70/128,846.73
  6. Step 6: Final answer
    x = 118,576.89

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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.