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Finding the Fourth Proportional to 111,768, 154,241.28 and 61,468.80

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Solution

The fourth proportional to 111,768, 154,241.28 and 61,468.80 is: 84,827.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,768 : 154,241.28 = 61,468.80 : x
  2. Step 2: Convert to fraction form
    111,768/154,241.28 = 61,468.80/x
  3. Step 3: Cross multiply
    111,768x = 154,241.28 × 61,468.80
  4. Step 4: Simplify right side
    111,768x = 9,481,026,392.06
  5. Step 5: Solve for x
    x = 9,481,026,392.06/111,768
  6. Step 6: Final answer
    x = 84,827.74

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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.