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Finding the Fourth Proportional to 111,328.70, 153,616.91 and 63,571.91

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Solution

The fourth proportional to 111,328.70, 153,616.91 and 63,571.91 is: 87,719.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,328.70 : 153,616.91 = 63,571.91 : x
  2. Step 2: Convert to fraction form
    111,328.70/153,616.91 = 63,571.91/x
  3. Step 3: Cross multiply
    111,328.70x = 153,616.91 × 63,571.91
  4. Step 4: Simplify right side
    111,328.70x = 9,765,719,291.05
  5. Step 5: Solve for x
    x = 9,765,719,291.05/111,328.70
  6. Step 6: Final answer
    x = 87,719.70

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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.