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Finding the Fourth Proportional to 85,716.52, 118,288.02 and 47,991.40

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Solution

The fourth proportional to 85,716.52, 118,288.02 and 47,991.40 is: 66,227.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,716.52 : 118,288.02 = 47,991.40 : x
  2. Step 2: Convert to fraction form
    85,716.52/118,288.02 = 47,991.40/x
  3. Step 3: Cross multiply
    85,716.52x = 118,288.02 × 47,991.40
  4. Step 4: Simplify right side
    85,716.52x = 5,676,807,683.03
  5. Step 5: Solve for x
    x = 5,676,807,683.03/85,716.52
  6. Step 6: Final answer
    x = 66,227.70

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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.