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Finding the Fourth Proportional to 100,589.67, 138,756.02 and 62,798.31

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Solution

The fourth proportional to 100,589.67, 138,756.02 and 62,798.31 is: 86,625.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,589.67 : 138,756.02 = 62,798.31 : x
  2. Step 2: Convert to fraction form
    100,589.67/138,756.02 = 62,798.31/x
  3. Step 3: Cross multiply
    100,589.67x = 138,756.02 × 62,798.31
  4. Step 4: Simplify right side
    100,589.67x = 8,713,643,244.33
  5. Step 5: Solve for x
    x = 8,713,643,244.33/100,589.67
  6. Step 6: Final answer
    x = 86,625.63

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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.