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Finding the Fourth Proportional to 78,857.40, 118,331.46 and 43,794.12

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Solution

The fourth proportional to 78,857.40, 118,331.46 and 43,794.12 is: 65,716.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,857.40 : 118,331.46 = 43,794.12 : x
  2. Step 2: Convert to fraction form
    78,857.40/118,331.46 = 43,794.12/x
  3. Step 3: Cross multiply
    78,857.40x = 118,331.46 × 43,794.12
  4. Step 4: Simplify right side
    78,857.40x = 5,182,222,159.02
  5. Step 5: Solve for x
    x = 5,182,222,159.02/78,857.40
  6. Step 6: Final answer
    x = 65,716.37

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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.