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Finding the Fourth Proportional to 78,856.64, 108,816 and 43,044.56

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Solution

The fourth proportional to 78,856.64, 108,816 and 43,044.56 is: 59,398.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,856.64 : 108,816 = 43,044.56 : x
  2. Step 2: Convert to fraction form
    78,856.64/108,816 = 43,044.56/x
  3. Step 3: Cross multiply
    78,856.64x = 108,816 × 43,044.56
  4. Step 4: Simplify right side
    78,856.64x = 4,683,936,840.96
  5. Step 5: Solve for x
    x = 4,683,936,840.96/78,856.64
  6. Step 6: Final answer
    x = 59,398.13

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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.