Home / 66,621.20-91,938.39-39,758.50

Finding the Fourth Proportional to 66,621.20, 91,938.39 and 39,758.50

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Solution

The fourth proportional to 66,621.20, 91,938.39 and 39,758.50 is: 54,867.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,621.20 : 91,938.39 = 39,758.50 : x
  2. Step 2: Convert to fraction form
    66,621.20/91,938.39 = 39,758.50/x
  3. Step 3: Cross multiply
    66,621.20x = 91,938.39 × 39,758.50
  4. Step 4: Simplify right side
    66,621.20x = 3,655,332,019.12
  5. Step 5: Solve for x
    x = 3,655,332,019.12/66,621.20
  6. Step 6: Final answer
    x = 54,867.40

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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.