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Finding the Fourth Proportional to 158,491.80, 218,699.22 and 100,325.80

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Solution

The fourth proportional to 158,491.80, 218,699.22 and 100,325.80 is: 138,437.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,491.80 : 218,699.22 = 100,325.80 : x
  2. Step 2: Convert to fraction form
    158,491.80/218,699.22 = 100,325.80/x
  3. Step 3: Cross multiply
    158,491.80x = 218,699.22 × 100,325.80
  4. Step 4: Simplify right side
    158,491.80x = 21,941,174,205.88
  5. Step 5: Solve for x
    x = 21,941,174,205.88/158,491.80
  6. Step 6: Final answer
    x = 138,437.28

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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.