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Finding the Fourth Proportional to 100,658.50, 138,917.37 and 55,955.14

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Solution

The fourth proportional to 100,658.50, 138,917.37 and 55,955.14 is: 77,222.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,658.50 : 138,917.37 = 55,955.14 : x
  2. Step 2: Convert to fraction form
    100,658.50/138,917.37 = 55,955.14/x
  3. Step 3: Cross multiply
    100,658.50x = 138,917.37 × 55,955.14
  4. Step 4: Simplify right side
    100,658.50x = 7,773,140,886.78
  5. Step 5: Solve for x
    x = 7,773,140,886.78/100,658.50
  6. Step 6: Final answer
    x = 77,222.90

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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.