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Finding the Fourth Proportional to 111,408.40, 153,744.24 and 63,663.49

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Solution

The fourth proportional to 111,408.40, 153,744.24 and 63,663.49 is: 87,855.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,408.40 : 153,744.24 = 63,663.49 : x
  2. Step 2: Convert to fraction form
    111,408.40/153,744.24 = 63,663.49/x
  3. Step 3: Cross multiply
    111,408.40x = 153,744.24 × 63,663.49
  4. Step 4: Simplify right side
    111,408.40x = 9,787,894,885.80
  5. Step 5: Solve for x
    x = 9,787,894,885.80/111,408.40
  6. Step 6: Final answer
    x = 87,855.99

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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.