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Finding the Fourth Proportional to 111,220.70, 153,487.37 and 68,223.90

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Solution

The fourth proportional to 111,220.70, 153,487.37 and 68,223.90 is: 94,150.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,220.70 : 153,487.37 = 68,223.90 : x
  2. Step 2: Convert to fraction form
    111,220.70/153,487.37 = 68,223.90/x
  3. Step 3: Cross multiply
    111,220.70x = 153,487.37 × 68,223.90
  4. Step 4: Simplify right side
    111,220.70x = 10,471,507,152.70
  5. Step 5: Solve for x
    x = 10,471,507,152.70/111,220.70
  6. Step 6: Final answer
    x = 94,150.70

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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.