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Finding the Fourth Proportional to 78,845.64, 108,807.36 and 43,036.56

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Solution

The fourth proportional to 78,845.64, 108,807.36 and 43,036.56 is: 59,390.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,845.64 : 108,807.36 = 43,036.56 : x
  2. Step 2: Convert to fraction form
    78,845.64/108,807.36 = 43,036.56/x
  3. Step 3: Cross multiply
    78,845.64x = 108,807.36 × 43,036.56
  4. Step 4: Simplify right side
    78,845.64x = 4,682,694,477.08
  5. Step 5: Solve for x
    x = 4,682,694,477.08/78,845.64
  6. Step 6: Final answer
    x = 59,390.66

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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.