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Finding the Fourth Proportional to 100,693.49, 138,922.41 and 62,439.26

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Solution

The fourth proportional to 100,693.49, 138,922.41 and 62,439.26 is: 86,144.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,693.49 : 138,922.41 = 62,439.26 : x
  2. Step 2: Convert to fraction form
    100,693.49/138,922.41 = 62,439.26/x
  3. Step 3: Cross multiply
    100,693.49x = 138,922.41 × 62,439.26
  4. Step 4: Simplify right side
    100,693.49x = 8,674,212,477.82
  5. Step 5: Solve for x
    x = 8,674,212,477.82/100,693.49
  6. Step 6: Final answer
    x = 86,144.72

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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.