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Finding the Fourth Proportional to 115,978.76, 159,694.80 and 101,556.08

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Solution

The fourth proportional to 115,978.76, 159,694.80 and 101,556.08 is: 139,835.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,978.76 : 159,694.80 = 101,556.08 : x
  2. Step 2: Convert to fraction form
    115,978.76/159,694.80 = 101,556.08/x
  3. Step 3: Cross multiply
    115,978.76x = 159,694.80 × 101,556.08
  4. Step 4: Simplify right side
    115,978.76x = 16,217,977,884.38
  5. Step 5: Solve for x
    x = 16,217,977,884.38/115,978.76
  6. Step 6: Final answer
    x = 139,835.76

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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.