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Finding the Fourth Proportional to 66,015, 91,105.50 and 37,720.08

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Solution

The fourth proportional to 66,015, 91,105.50 and 37,720.08 is: 52,056.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,015 : 91,105.50 = 37,720.08 : x
  2. Step 2: Convert to fraction form
    66,015/91,105.50 = 37,720.08/x
  3. Step 3: Cross multiply
    66,015x = 91,105.50 × 37,720.08
  4. Step 4: Simplify right side
    66,015x = 3,436,506,748.44
  5. Step 5: Solve for x
    x = 3,436,506,748.44/66,015
  6. Step 6: Final answer
    x = 52,056.45

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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.