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Finding the Fourth Proportional to 127,900.71, 191,686.87 and 61,240.95

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Solution

The fourth proportional to 127,900.71, 191,686.87 and 61,240.95 is: 91,782.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,900.71 : 191,686.87 = 61,240.95 : x
  2. Step 2: Convert to fraction form
    127,900.71/191,686.87 = 61,240.95/x
  3. Step 3: Cross multiply
    127,900.71x = 191,686.87 × 61,240.95
  4. Step 4: Simplify right side
    127,900.71x = 11,739,086,021.33
  5. Step 5: Solve for x
    x = 11,739,086,021.33/127,900.71
  6. Step 6: Final answer
    x = 91,782.81

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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.