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Finding the Fourth Proportional to 111,842.89, 154,284.31 and 66,488.59

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Solution

The fourth proportional to 111,842.89, 154,284.31 and 66,488.59 is: 91,719.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,842.89 : 154,284.31 = 66,488.59 : x
  2. Step 2: Convert to fraction form
    111,842.89/154,284.31 = 66,488.59/x
  3. Step 3: Cross multiply
    111,842.89x = 154,284.31 × 66,488.59
  4. Step 4: Simplify right side
    111,842.89x = 10,258,146,506.99
  5. Step 5: Solve for x
    x = 10,258,146,506.99/111,842.89
  6. Step 6: Final answer
    x = 91,719.26

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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.