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Finding the Fourth Proportional to 108,499.92, 149,669.64 and 76,283.76

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Solution

The fourth proportional to 108,499.92, 149,669.64 and 76,283.76 is: 105,229.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,499.92 : 149,669.64 = 76,283.76 : x
  2. Step 2: Convert to fraction form
    108,499.92/149,669.64 = 76,283.76/x
  3. Step 3: Cross multiply
    108,499.92x = 149,669.64 × 76,283.76
  4. Step 4: Simplify right side
    108,499.92x = 11,417,362,897.05
  5. Step 5: Solve for x
    x = 11,417,362,897.05/108,499.92
  6. Step 6: Final answer
    x = 105,229.23

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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.