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Finding the Fourth Proportional to 111,431.10, 153,774 and 60,443.70

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Solution

The fourth proportional to 111,431.10, 153,774 and 60,443.70 is: 83,411.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,431.10 : 153,774 = 60,443.70 : x
  2. Step 2: Convert to fraction form
    111,431.10/153,774 = 60,443.70/x
  3. Step 3: Cross multiply
    111,431.10x = 153,774 × 60,443.70
  4. Step 4: Simplify right side
    111,431.10x = 9,294,669,523.80
  5. Step 5: Solve for x
    x = 9,294,669,523.80/111,431.10
  6. Step 6: Final answer
    x = 83,411.81

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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.