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Finding the Fourth Proportional to 159,981.88, 220,756.12 and 88,357.64

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Solution

The fourth proportional to 159,981.88, 220,756.12 and 88,357.64 is: 121,923.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,981.88 : 220,756.12 = 88,357.64 : x
  2. Step 2: Convert to fraction form
    159,981.88/220,756.12 = 88,357.64/x
  3. Step 3: Cross multiply
    159,981.88x = 220,756.12 × 88,357.64
  4. Step 4: Simplify right side
    159,981.88x = 19,505,489,778.76
  5. Step 5: Solve for x
    x = 19,505,489,778.76/159,981.88
  6. Step 6: Final answer
    x = 121,923.12

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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.