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Finding the Fourth Proportional to 78,324, 108,087.12 and 44,790

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Solution

The fourth proportional to 78,324, 108,087.12 and 44,790 is: 61,810.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,324 : 108,087.12 = 44,790 : x
  2. Step 2: Convert to fraction form
    78,324/108,087.12 = 44,790/x
  3. Step 3: Cross multiply
    78,324x = 108,087.12 × 44,790
  4. Step 4: Simplify right side
    78,324x = 4,841,222,104.80
  5. Step 5: Solve for x
    x = 4,841,222,104.80/78,324
  6. Step 6: Final answer
    x = 61,810.20

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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.