Home / 66,729.12-91,979.44-45,212.32

Finding the Fourth Proportional to 66,729.12, 91,979.44 and 45,212.32

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Solution

The fourth proportional to 66,729.12, 91,979.44 and 45,212.32 is: 62,320.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,729.12 : 91,979.44 = 45,212.32 : x
  2. Step 2: Convert to fraction form
    66,729.12/91,979.44 = 45,212.32/x
  3. Step 3: Cross multiply
    66,729.12x = 91,979.44 × 45,212.32
  4. Step 4: Simplify right side
    66,729.12x = 4,158,603,874.70
  5. Step 5: Solve for x
    x = 4,158,603,874.70/66,729.12
  6. Step 6: Final answer
    x = 62,320.68

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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.