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Finding the Fourth Proportional to 101,865.79, 140,559.79 and 56,544.12

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Solution

The fourth proportional to 101,865.79, 140,559.79 and 56,544.12 is: 78,022.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,865.79 : 140,559.79 = 56,544.12 : x
  2. Step 2: Convert to fraction form
    101,865.79/140,559.79 = 56,544.12/x
  3. Step 3: Cross multiply
    101,865.79x = 140,559.79 × 56,544.12
  4. Step 4: Simplify right side
    101,865.79x = 7,947,829,632.93
  5. Step 5: Solve for x
    x = 7,947,829,632.93/101,865.79
  6. Step 6: Final answer
    x = 78,022.56

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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.