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Finding the Fourth Proportional to 78,891.93, 118,320.21 and 22,719.51

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Solution

The fourth proportional to 78,891.93, 118,320.21 and 22,719.51 is: 34,074.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,891.93 : 118,320.21 = 22,719.51 : x
  2. Step 2: Convert to fraction form
    78,891.93/118,320.21 = 22,719.51/x
  3. Step 3: Cross multiply
    78,891.93x = 118,320.21 × 22,719.51
  4. Step 4: Simplify right side
    78,891.93x = 2,688,177,194.30
  5. Step 5: Solve for x
    x = 2,688,177,194.30/78,891.93
  6. Step 6: Final answer
    x = 34,074.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.