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Finding the Fourth Proportional to 78,957.63, 108,962.96 and 43,149.15

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Solution

The fourth proportional to 78,957.63, 108,962.96 and 43,149.15 is: 59,546.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,957.63 : 108,962.96 = 43,149.15 : x
  2. Step 2: Convert to fraction form
    78,957.63/108,962.96 = 43,149.15/x
  3. Step 3: Cross multiply
    78,957.63x = 108,962.96 × 43,149.15
  4. Step 4: Simplify right side
    78,957.63x = 4,701,658,889.74
  5. Step 5: Solve for x
    x = 4,701,658,889.74/78,957.63
  6. Step 6: Final answer
    x = 59,546.61

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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.