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Finding the Fourth Proportional to 78,896.62, 108,878.20 and 43,087.68

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Solution

The fourth proportional to 78,896.62, 108,878.20 and 43,087.68 is: 59,461.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,896.62 : 108,878.20 = 43,087.68 : x
  2. Step 2: Convert to fraction form
    78,896.62/108,878.20 = 43,087.68/x
  3. Step 3: Cross multiply
    78,896.62x = 108,878.20 × 43,087.68
  4. Step 4: Simplify right side
    78,896.62x = 4,691,308,825.14
  5. Step 5: Solve for x
    x = 4,691,308,825.14/78,896.62
  6. Step 6: Final answer
    x = 59,461.47

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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.