Home / 77,839.38-107,376.84-47,639.34

Finding the Fourth Proportional to 77,839.38, 107,376.84 and 47,639.34

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Solution

The fourth proportional to 77,839.38, 107,376.84 and 47,639.34 is: 65,716.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,839.38 : 107,376.84 = 47,639.34 : x
  2. Step 2: Convert to fraction form
    77,839.38/107,376.84 = 47,639.34/x
  3. Step 3: Cross multiply
    77,839.38x = 107,376.84 × 47,639.34
  4. Step 4: Simplify right side
    77,839.38x = 5,115,361,788.89
  5. Step 5: Solve for x
    x = 5,115,361,788.89/77,839.38
  6. Step 6: Final answer
    x = 65,716.89

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1.5x scale

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.