Home / 66,485.71-91,741.20-38,191.40

Finding the Fourth Proportional to 66,485.71, 91,741.20 and 38,191.40

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Solution

The fourth proportional to 66,485.71, 91,741.20 and 38,191.40 is: 52,698.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,485.71 : 91,741.20 = 38,191.40 : x
  2. Step 2: Convert to fraction form
    66,485.71/91,741.20 = 38,191.40/x
  3. Step 3: Cross multiply
    66,485.71x = 91,741.20 × 38,191.40
  4. Step 4: Simplify right side
    66,485.71x = 3,503,724,865.68
  5. Step 5: Solve for x
    x = 3,503,724,865.68/66,485.71
  6. Step 6: Final answer
    x = 52,698.92

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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.