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Finding the Fourth Proportional to 158,387.21, 218,399.14 and 100,935.46

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Solution

The fourth proportional to 158,387.21, 218,399.14 and 100,935.46 is: 139,179.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,387.21 : 218,399.14 = 100,935.46 : x
  2. Step 2: Convert to fraction form
    158,387.21/218,399.14 = 100,935.46/x
  3. Step 3: Cross multiply
    158,387.21x = 218,399.14 × 100,935.46
  4. Step 4: Simplify right side
    158,387.21x = 22,044,216,861.17
  5. Step 5: Solve for x
    x = 22,044,216,861.17/158,387.21
  6. Step 6: Final answer
    x = 139,179.28

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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.