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Finding the Fourth Proportional to 111,857.62, 154,363.54 and 61,556.62

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Solution

The fourth proportional to 111,857.62, 154,363.54 and 61,556.62 is: 84,948.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,857.62 : 154,363.54 = 61,556.62 : x
  2. Step 2: Convert to fraction form
    111,857.62/154,363.54 = 61,556.62/x
  3. Step 3: Cross multiply
    111,857.62x = 154,363.54 × 61,556.62
  4. Step 4: Simplify right side
    111,857.62x = 9,502,097,619.74
  5. Step 5: Solve for x
    x = 9,502,097,619.74/111,857.62
  6. Step 6: Final answer
    x = 84,948.15

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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.