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Finding the Fourth Proportional to 85,847.72, 118,482 and 47,615.72

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Solution

The fourth proportional to 85,847.72, 118,482 and 47,615.72 is: 65,716.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,847.72 : 118,482 = 47,615.72 : x
  2. Step 2: Convert to fraction form
    85,847.72/118,482 = 47,615.72/x
  3. Step 3: Cross multiply
    85,847.72x = 118,482 × 47,615.72
  4. Step 4: Simplify right side
    85,847.72x = 5,641,605,737.04
  5. Step 5: Solve for x
    x = 5,641,605,737.04/85,847.72
  6. Step 6: Final answer
    x = 65,716.43

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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.