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Finding the Fourth Proportional to 66,138.59, 91,271.93 and 35,924.20

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Solution

The fourth proportional to 66,138.59, 91,271.93 and 35,924.20 is: 49,575.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,138.59 : 91,271.93 = 35,924.20 : x
  2. Step 2: Convert to fraction form
    66,138.59/91,271.93 = 35,924.20/x
  3. Step 3: Cross multiply
    66,138.59x = 91,271.93 × 35,924.20
  4. Step 4: Simplify right side
    66,138.59x = 3,278,870,659.91
  5. Step 5: Solve for x
    x = 3,278,870,659.91/66,138.59
  6. Step 6: Final answer
    x = 49,575.76

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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.