Home / 77,015.20-115,436.40-39,560.80

Finding the Fourth Proportional to 77,015.20, 115,436.40 and 39,560.80

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Solution

The fourth proportional to 77,015.20, 115,436.40 and 39,560.80 is: 59,296.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,015.20 : 115,436.40 = 39,560.80 : x
  2. Step 2: Convert to fraction form
    77,015.20/115,436.40 = 39,560.80/x
  3. Step 3: Cross multiply
    77,015.20x = 115,436.40 × 39,560.80
  4. Step 4: Simplify right side
    77,015.20x = 4,566,756,333.12
  5. Step 5: Solve for x
    x = 4,566,756,333.12/77,015.20
  6. Step 6: Final answer
    x = 59,296.82

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1.5x scale

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.