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Finding the Fourth Proportional to 66,019.94, 91,109.85 and 47,202.02

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Solution

The fourth proportional to 66,019.94, 91,109.85 and 47,202.02 is: 65,140.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,019.94 : 91,109.85 = 47,202.02 : x
  2. Step 2: Convert to fraction form
    66,019.94/91,109.85 = 47,202.02/x
  3. Step 3: Cross multiply
    66,019.94x = 91,109.85 × 47,202.02
  4. Step 4: Simplify right side
    66,019.94x = 4,300,568,961.90
  5. Step 5: Solve for x
    x = 4,300,568,961.90/66,019.94
  6. Step 6: Final answer
    x = 65,140.46

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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.