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Finding the Fourth Proportional to 100,977.64, 139,350.10 and 55,655.70

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Solution

The fourth proportional to 100,977.64, 139,350.10 and 55,655.70 is: 76,805.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,977.64 : 139,350.10 = 55,655.70 : x
  2. Step 2: Convert to fraction form
    100,977.64/139,350.10 = 55,655.70/x
  3. Step 3: Cross multiply
    100,977.64x = 139,350.10 × 55,655.70
  4. Step 4: Simplify right side
    100,977.64x = 7,755,627,360.57
  5. Step 5: Solve for x
    x = 7,755,627,360.57/100,977.64
  6. Step 6: Final answer
    x = 76,805.39

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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.