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Finding the Fourth Proportional to 111,650.54, 154,038.96 and 71,387.87

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Solution

The fourth proportional to 111,650.54, 154,038.96 and 71,387.87 is: 98,490.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,650.54 : 154,038.96 = 71,387.87 : x
  2. Step 2: Convert to fraction form
    111,650.54/154,038.96 = 71,387.87/x
  3. Step 3: Cross multiply
    111,650.54x = 154,038.96 × 71,387.87
  4. Step 4: Simplify right side
    111,650.54x = 10,996,512,481.22
  5. Step 5: Solve for x
    x = 10,996,512,481.22/111,650.54
  6. Step 6: Final answer
    x = 98,490.46

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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.