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Finding the Fourth Proportional to 100,901.76, 139,245.39 and 55,579.94

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Solution

The fourth proportional to 100,901.76, 139,245.39 and 55,579.94 is: 76,700.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,901.76 : 139,245.39 = 55,579.94 : x
  2. Step 2: Convert to fraction form
    100,901.76/139,245.39 = 55,579.94/x
  3. Step 3: Cross multiply
    100,901.76x = 139,245.39 × 55,579.94
  4. Step 4: Simplify right side
    100,901.76x = 7,739,249,725.25
  5. Step 5: Solve for x
    x = 7,739,249,725.25/100,901.76
  6. Step 6: Final answer
    x = 76,700.84

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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.