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Finding the Fourth Proportional to 101,072.15, 139,477.12 and 55,749.15

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Solution

The fourth proportional to 101,072.15, 139,477.12 and 55,749.15 is: 76,932.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,072.15 : 139,477.12 = 55,749.15 : x
  2. Step 2: Convert to fraction form
    101,072.15/139,477.12 = 55,749.15/x
  3. Step 3: Cross multiply
    101,072.15x = 139,477.12 × 55,749.15
  4. Step 4: Simplify right side
    101,072.15x = 7,775,730,745.08
  5. Step 5: Solve for x
    x = 7,775,730,745.08/101,072.15
  6. Step 6: Final answer
    x = 76,932.48

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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.