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Finding the Fourth Proportional to 101,860.73, 140,565.11 and 56,538.59

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Solution

The fourth proportional to 101,860.73, 140,565.11 and 56,538.59 is: 78,021.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,860.73 : 140,565.11 = 56,538.59 : x
  2. Step 2: Convert to fraction form
    101,860.73/140,565.11 = 56,538.59/x
  3. Step 3: Cross multiply
    101,860.73x = 140,565.11 × 56,538.59
  4. Step 4: Simplify right side
    101,860.73x = 7,947,352,137.08
  5. Step 5: Solve for x
    x = 7,947,352,137.08/101,860.73
  6. Step 6: Final answer
    x = 78,021.75

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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.