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Finding the Fourth Proportional to 78,859.40, 118,334.46 and 43,796.12

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Solution

The fourth proportional to 78,859.40, 118,334.46 and 43,796.12 is: 65,719.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,859.40 : 118,334.46 = 43,796.12 : x
  2. Step 2: Convert to fraction form
    78,859.40/118,334.46 = 43,796.12/x
  3. Step 3: Cross multiply
    78,859.40x = 118,334.46 × 43,796.12
  4. Step 4: Simplify right side
    78,859.40x = 5,182,590,210.30
  5. Step 5: Solve for x
    x = 5,182,590,210.30/78,859.40
  6. Step 6: Final answer
    x = 65,719.37

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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.