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Finding the Fourth Proportional to 100,657.41, 138,910.80 and 57,644.59

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Solution

The fourth proportional to 100,657.41, 138,910.80 and 57,644.59 is: 79,551.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,657.41 : 138,910.80 = 57,644.59 : x
  2. Step 2: Convert to fraction form
    100,657.41/138,910.80 = 57,644.59/x
  3. Step 3: Cross multiply
    100,657.41x = 138,910.80 × 57,644.59
  4. Step 4: Simplify right side
    100,657.41x = 8,007,455,526.98
  5. Step 5: Solve for x
    x = 8,007,455,526.98/100,657.41
  6. Step 6: Final answer
    x = 79,551.58

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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.