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Finding the Fourth Proportional to 111,311.89, 153,621.47 and 63,572.42

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Solution

The fourth proportional to 111,311.89, 153,621.47 and 63,572.42 is: 87,736.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,311.89 : 153,621.47 = 63,572.42 : x
  2. Step 2: Convert to fraction form
    111,311.89/153,621.47 = 63,572.42/x
  3. Step 3: Cross multiply
    111,311.89x = 153,621.47 × 63,572.42
  4. Step 4: Simplify right side
    111,311.89x = 9,766,089,154.84
  5. Step 5: Solve for x
    x = 9,766,089,154.84/111,311.89
  6. Step 6: Final answer
    x = 87,736.26

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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.