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Finding the Fourth Proportional to 139,648.28, 192,715.46 and 75,986.46

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Solution

The fourth proportional to 139,648.28, 192,715.46 and 75,986.46 is: 104,861.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,648.28 : 192,715.46 = 75,986.46 : x
  2. Step 2: Convert to fraction form
    139,648.28/192,715.46 = 75,986.46/x
  3. Step 3: Cross multiply
    139,648.28x = 192,715.46 × 75,986.46
  4. Step 4: Simplify right side
    139,648.28x = 14,643,765,592.67
  5. Step 5: Solve for x
    x = 14,643,765,592.67/139,648.28
  6. Step 6: Final answer
    x = 104,861.77

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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.