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Finding the Fourth Proportional to 101,121.52, 139,556.52 and 55,803.76

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Solution

The fourth proportional to 101,121.52, 139,556.52 and 55,803.76 is: 77,014.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,121.52 : 139,556.52 = 55,803.76 : x
  2. Step 2: Convert to fraction form
    101,121.52/139,556.52 = 55,803.76/x
  3. Step 3: Cross multiply
    101,121.52x = 139,556.52 × 55,803.76
  4. Step 4: Simplify right side
    101,121.52x = 7,787,778,548.52
  5. Step 5: Solve for x
    x = 7,787,778,548.52/101,121.52
  6. Step 6: Final answer
    x = 77,014.06

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1.5x scale

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.