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Finding the Fourth Proportional to 108,076.56, 149,079.36 and 71,779.68

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Solution

The fourth proportional to 108,076.56, 149,079.36 and 71,779.68 is: 99,011.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,076.56 : 149,079.36 = 71,779.68 : x
  2. Step 2: Convert to fraction form
    108,076.56/149,079.36 = 71,779.68/x
  3. Step 3: Cross multiply
    108,076.56x = 149,079.36 × 71,779.68
  4. Step 4: Simplify right side
    108,076.56x = 10,700,868,755.40
  5. Step 5: Solve for x
    x = 10,700,868,755.40/108,076.56
  6. Step 6: Final answer
    x = 99,011.93

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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.