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Finding the Fourth Proportional to 128,072.46, 176,679.96 and 82,764.69

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Solution

The fourth proportional to 128,072.46, 176,679.96 and 82,764.69 is: 114,176.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,072.46 : 176,679.96 = 82,764.69 : x
  2. Step 2: Convert to fraction form
    128,072.46/176,679.96 = 82,764.69/x
  3. Step 3: Cross multiply
    128,072.46x = 176,679.96 × 82,764.69
  4. Step 4: Simplify right side
    128,072.46x = 14,622,862,118.61
  5. Step 5: Solve for x
    x = 14,622,862,118.61/128,072.46
  6. Step 6: Final answer
    x = 114,176.48

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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.