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Finding the Fourth Proportional to 101,278.26, 139,756.82 and 55,955.76

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Solution

The fourth proportional to 101,278.26, 139,756.82 and 55,955.76 is: 77,214.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,278.26 : 139,756.82 = 55,955.76 : x
  2. Step 2: Convert to fraction form
    101,278.26/139,756.82 = 55,955.76/x
  3. Step 3: Cross multiply
    101,278.26x = 139,756.82 × 55,955.76
  4. Step 4: Simplify right side
    101,278.26x = 7,820,199,217.92
  5. Step 5: Solve for x
    x = 7,820,199,217.92/101,278.26
  6. Step 6: Final answer
    x = 77,214.98

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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.