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Finding the Fourth Proportional to 100,889.39, 139,215.17 and 57,866.66

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Solution

The fourth proportional to 100,889.39, 139,215.17 and 57,866.66 is: 79,848.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,889.39 : 139,215.17 = 57,866.66 : x
  2. Step 2: Convert to fraction form
    100,889.39/139,215.17 = 57,866.66/x
  3. Step 3: Cross multiply
    100,889.39x = 139,215.17 × 57,866.66
  4. Step 4: Simplify right side
    100,889.39x = 8,055,915,923.82
  5. Step 5: Solve for x
    x = 8,055,915,923.82/100,889.39
  6. Step 6: Final answer
    x = 79,848.99

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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.