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Finding the Fourth Proportional to 127,573.80, 191,386.53 and 71,493.90

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Solution

The fourth proportional to 127,573.80, 191,386.53 and 71,493.90 is: 107,255.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,573.80 : 191,386.53 = 71,493.90 : x
  2. Step 2: Convert to fraction form
    127,573.80/191,386.53 = 71,493.90/x
  3. Step 3: Cross multiply
    127,573.80x = 191,386.53 × 71,493.90
  4. Step 4: Simplify right side
    127,573.80x = 13,682,969,437.17
  5. Step 5: Solve for x
    x = 13,682,969,437.17/127,573.80
  6. Step 6: Final answer
    x = 107,255.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.