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Finding the Fourth Proportional to 66,816.84, 100,085.79 and 40,078.03

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Solution

The fourth proportional to 66,816.84, 100,085.79 and 40,078.03 is: 60,033.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,816.84 : 100,085.79 = 40,078.03 : x
  2. Step 2: Convert to fraction form
    66,816.84/100,085.79 = 40,078.03/x
  3. Step 3: Cross multiply
    66,816.84x = 100,085.79 × 40,078.03
  4. Step 4: Simplify right side
    66,816.84x = 4,011,241,294.19
  5. Step 5: Solve for x
    x = 4,011,241,294.19/66,816.84
  6. Step 6: Final answer
    x = 60,033.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.