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Finding the Fourth Proportional to 101,000.79, 139,375.46 and 55,678.70

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Solution

The fourth proportional to 101,000.79, 139,375.46 and 55,678.70 is: 76,833.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,000.79 : 139,375.46 = 55,678.70 : x
  2. Step 2: Convert to fraction form
    101,000.79/139,375.46 = 55,678.70/x
  3. Step 3: Cross multiply
    101,000.79x = 139,375.46 × 55,678.70
  4. Step 4: Simplify right side
    101,000.79x = 7,760,244,912.34
  5. Step 5: Solve for x
    x = 7,760,244,912.34/101,000.79
  6. Step 6: Final answer
    x = 76,833.51

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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.