Home / 66,085.36-90,967.32-57,039.42

Finding the Fourth Proportional to 66,085.36, 90,967.32 and 57,039.42

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Solution

The fourth proportional to 66,085.36, 90,967.32 and 57,039.42 is: 78,515.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,085.36 : 90,967.32 = 57,039.42 : x
  2. Step 2: Convert to fraction form
    66,085.36/90,967.32 = 57,039.42/x
  3. Step 3: Cross multiply
    66,085.36x = 90,967.32 × 57,039.42
  4. Step 4: Simplify right side
    66,085.36x = 5,188,723,517.95
  5. Step 5: Solve for x
    x = 5,188,723,517.95/66,085.36
  6. Step 6: Final answer
    x = 78,515.47

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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.