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Finding the Fourth Proportional to 66,441.96, 91,479.78 and 53,908.20

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Solution

The fourth proportional to 66,441.96, 91,479.78 and 53,908.20 is: 74,222.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,441.96 : 91,479.78 = 53,908.20 : x
  2. Step 2: Convert to fraction form
    66,441.96/91,479.78 = 53,908.20/x
  3. Step 3: Cross multiply
    66,441.96x = 91,479.78 × 53,908.20
  4. Step 4: Simplify right side
    66,441.96x = 4,931,510,276.20
  5. Step 5: Solve for x
    x = 4,931,510,276.20/66,441.96
  6. Step 6: Final answer
    x = 74,222.83

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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.