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Finding the Fourth Proportional to 66,019, 91,106.58 and 39,175

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Solution

The fourth proportional to 66,019, 91,106.58 and 39,175 is: 54,061.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,019 : 91,106.58 = 39,175 : x
  2. Step 2: Convert to fraction form
    66,019/91,106.58 = 39,175/x
  3. Step 3: Cross multiply
    66,019x = 91,106.58 × 39,175
  4. Step 4: Simplify right side
    66,019x = 3,569,100,271.50
  5. Step 5: Solve for x
    x = 3,569,100,271.50/66,019
  6. Step 6: Final answer
    x = 54,061.71

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.