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Finding the Fourth Proportional to 111,377.28, 153,707.94 and 61,076.28

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Solution

The fourth proportional to 111,377.28, 153,707.94 and 61,076.28 is: 84,289.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,377.28 : 153,707.94 = 61,076.28 : x
  2. Step 2: Convert to fraction form
    111,377.28/153,707.94 = 61,076.28/x
  3. Step 3: Cross multiply
    111,377.28x = 153,707.94 × 61,076.28
  4. Step 4: Simplify right side
    111,377.28x = 9,387,909,181.66
  5. Step 5: Solve for x
    x = 9,387,909,181.66/111,377.28
  6. Step 6: Final answer
    x = 84,289.27

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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.