Home / 77,821.49-108,118.68-76,888.37

Finding the Fourth Proportional to 77,821.49, 108,118.68 and 76,888.37

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Solution

The fourth proportional to 77,821.49, 108,118.68 and 76,888.37 is: 106,822.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,821.49 : 108,118.68 = 76,888.37 : x
  2. Step 2: Convert to fraction form
    77,821.49/108,118.68 = 76,888.37/x
  3. Step 3: Cross multiply
    77,821.49x = 108,118.68 × 76,888.37
  4. Step 4: Simplify right side
    77,821.49x = 8,313,069,071.75
  5. Step 5: Solve for x
    x = 8,313,069,071.75/77,821.49
  6. Step 6: Final answer
    x = 106,822.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.