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Finding the Fourth Proportional to 111,578.25, 153,979.20 and 61,277.25

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Solution

The fourth proportional to 111,578.25, 153,979.20 and 61,277.25 is: 84,563.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,578.25 : 153,979.20 = 61,277.25 : x
  2. Step 2: Convert to fraction form
    111,578.25/153,979.20 = 61,277.25/x
  3. Step 3: Cross multiply
    111,578.25x = 153,979.20 × 61,277.25
  4. Step 4: Simplify right side
    111,578.25x = 9,435,421,933.20
  5. Step 5: Solve for x
    x = 9,435,421,933.20/111,578.25
  6. Step 6: Final answer
    x = 84,563.27

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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.