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Finding the Fourth Proportional to 66,170.94, 91,278.93 and 40,659.58

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Solution

The fourth proportional to 66,170.94, 91,278.93 and 40,659.58 is: 56,087.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,170.94 : 91,278.93 = 40,659.58 : x
  2. Step 2: Convert to fraction form
    66,170.94/91,278.93 = 40,659.58/x
  3. Step 3: Cross multiply
    66,170.94x = 91,278.93 × 40,659.58
  4. Step 4: Simplify right side
    66,170.94x = 3,711,362,956.65
  5. Step 5: Solve for x
    x = 3,711,362,956.65/66,170.94
  6. Step 6: Final answer
    x = 56,087.51

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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.