Home / 78,631.10-108,511.62-42,821.27

Finding the Fourth Proportional to 78,631.10, 108,511.62 and 42,821.27

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Solution

The fourth proportional to 78,631.10, 108,511.62 and 42,821.27 is: 59,093.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,631.10 : 108,511.62 = 42,821.27 : x
  2. Step 2: Convert to fraction form
    78,631.10/108,511.62 = 42,821.27/x
  3. Step 3: Cross multiply
    78,631.10x = 108,511.62 × 42,821.27
  4. Step 4: Simplify right side
    78,631.10x = 4,646,605,378.16
  5. Step 5: Solve for x
    x = 4,646,605,378.16/78,631.10
  6. Step 6: Final answer
    x = 59,093.73

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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.