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Finding the Fourth Proportional to 100,124.88, 138,187.80 and 57,104.52

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Solution

The fourth proportional to 100,124.88, 138,187.80 and 57,104.52 is: 78,813.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,124.88 : 138,187.80 = 57,104.52 : x
  2. Step 2: Convert to fraction form
    100,124.88/138,187.80 = 57,104.52/x
  3. Step 3: Cross multiply
    100,124.88x = 138,187.80 × 57,104.52
  4. Step 4: Simplify right side
    100,124.88x = 7,891,147,988.86
  5. Step 5: Solve for x
    x = 7,891,147,988.86/100,124.88
  6. Step 6: Final answer
    x = 78,813.06

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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.