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Finding the Fourth Proportional to 111,631.50, 154,051.53 and 61,333.74

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Solution

The fourth proportional to 111,631.50, 154,051.53 and 61,333.74 is: 84,640.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,631.50 : 154,051.53 = 61,333.74 : x
  2. Step 2: Convert to fraction form
    111,631.50/154,051.53 = 61,333.74/x
  3. Step 3: Cross multiply
    111,631.50x = 154,051.53 × 61,333.74
  4. Step 4: Simplify right side
    111,631.50x = 9,448,556,487.62
  5. Step 5: Solve for x
    x = 9,448,556,487.62/111,631.50
  6. Step 6: Final answer
    x = 84,640.59

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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.