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Finding the Fourth Proportional to 78,957.05, 108,960.08 and 43,146.41

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Solution

The fourth proportional to 78,957.05, 108,960.08 and 43,146.41 is: 59,541.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,957.05 : 108,960.08 = 43,146.41 : x
  2. Step 2: Convert to fraction form
    78,957.05/108,960.08 = 43,146.41/x
  3. Step 3: Cross multiply
    78,957.05x = 108,960.08 × 43,146.41
  4. Step 4: Simplify right side
    78,957.05x = 4,701,236,285.31
  5. Step 5: Solve for x
    x = 4,701,236,285.31/78,957.05
  6. Step 6: Final answer
    x = 59,541.69

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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.