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Finding the Fourth Proportional to 128,250.31, 176,979.94 and 70,886.70

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Solution

The fourth proportional to 128,250.31, 176,979.94 and 70,886.70 is: 97,820.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,250.31 : 176,979.94 = 70,886.70 : x
  2. Step 2: Convert to fraction form
    128,250.31/176,979.94 = 70,886.70/x
  3. Step 3: Cross multiply
    128,250.31x = 176,979.94 × 70,886.70
  4. Step 4: Simplify right side
    128,250.31x = 12,545,523,912.80
  5. Step 5: Solve for x
    x = 12,545,523,912.80/128,250.31
  6. Step 6: Final answer
    x = 97,820.61

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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.