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Finding the Fourth Proportional to 101,077.28, 139,487.16 and 55,756.88

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Solution

The fourth proportional to 101,077.28, 139,487.16 and 55,756.88 is: 76,944.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,077.28 : 139,487.16 = 55,756.88 : x
  2. Step 2: Convert to fraction form
    101,077.28/139,487.16 = 55,756.88/x
  3. Step 3: Cross multiply
    101,077.28x = 139,487.16 × 55,756.88
  4. Step 4: Simplify right side
    101,077.28x = 7,777,368,841.66
  5. Step 5: Solve for x
    x = 7,777,368,841.66/101,077.28
  6. Step 6: Final answer
    x = 76,944.78

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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.