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Finding the Fourth Proportional to 111,430.38, 153,784.44 and 63,674.49

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Solution

The fourth proportional to 111,430.38, 153,784.44 and 63,674.49 is: 87,876.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,430.38 : 153,784.44 = 63,674.49 : x
  2. Step 2: Convert to fraction form
    111,430.38/153,784.44 = 63,674.49/x
  3. Step 3: Cross multiply
    111,430.38x = 153,784.44 × 63,674.49
  4. Step 4: Simplify right side
    111,430.38x = 9,792,145,786.94
  5. Step 5: Solve for x
    x = 9,792,145,786.94/111,430.38
  6. Step 6: Final answer
    x = 87,876.81

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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.