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Finding the Fourth Proportional to 66,397.74, 91,588.59 and 39,522.30

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Solution

The fourth proportional to 66,397.74, 91,588.59 and 39,522.30 is: 54,516.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,397.74 : 91,588.59 = 39,522.30 : x
  2. Step 2: Convert to fraction form
    66,397.74/91,588.59 = 39,522.30/x
  3. Step 3: Cross multiply
    66,397.74x = 91,588.59 × 39,522.30
  4. Step 4: Simplify right side
    66,397.74x = 3,619,791,730.56
  5. Step 5: Solve for x
    x = 3,619,791,730.56/66,397.74
  6. Step 6: Final answer
    x = 54,516.79

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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.