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Finding the Fourth Proportional to 66,397.48, 91,648.74 and 39,544.36

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Solution

The fourth proportional to 66,397.48, 91,648.74 and 39,544.36 is: 54,583.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,397.48 : 91,648.74 = 39,544.36 : x
  2. Step 2: Convert to fraction form
    66,397.48/91,648.74 = 39,544.36/x
  3. Step 3: Cross multiply
    66,397.48x = 91,648.74 × 39,544.36
  4. Step 4: Simplify right side
    66,397.48x = 3,624,190,768.11
  5. Step 5: Solve for x
    x = 3,624,190,768.11/66,397.48
  6. Step 6: Final answer
    x = 54,583.26

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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.