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Finding the Fourth Proportional to 108,071.54, 149,170.40 and 62,769.89

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Solution

The fourth proportional to 108,071.54, 149,170.40 and 62,769.89 is: 86,640.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,071.54 : 149,170.40 = 62,769.89 : x
  2. Step 2: Convert to fraction form
    108,071.54/149,170.40 = 62,769.89/x
  3. Step 3: Cross multiply
    108,071.54x = 149,170.40 × 62,769.89
  4. Step 4: Simplify right side
    108,071.54x = 9,363,408,539.55
  5. Step 5: Solve for x
    x = 9,363,408,539.55/108,071.54
  6. Step 6: Final answer
    x = 86,640.84

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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.