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Finding the Fourth Proportional to 111,478.71, 153,968.41 and 73,408.48

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Solution

The fourth proportional to 111,478.71, 153,968.41 and 73,408.48 is: 101,387.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,478.71 : 153,968.41 = 73,408.48 : x
  2. Step 2: Convert to fraction form
    111,478.71/153,968.41 = 73,408.48/x
  3. Step 3: Cross multiply
    111,478.71x = 153,968.41 × 73,408.48
  4. Step 4: Simplify right side
    111,478.71x = 11,302,586,652.96
  5. Step 5: Solve for x
    x = 11,302,586,652.96/111,478.71
  6. Step 6: Final answer
    x = 101,387.85

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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.