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Finding the Fourth Proportional to 111,631.50, 154,053.90 and 61,330.50

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Solution

The fourth proportional to 111,631.50, 154,053.90 and 61,330.50 is: 84,637.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,631.50 : 154,053.90 = 61,330.50 : x
  2. Step 2: Convert to fraction form
    111,631.50/154,053.90 = 61,330.50/x
  3. Step 3: Cross multiply
    111,631.50x = 154,053.90 × 61,330.50
  4. Step 4: Simplify right side
    111,631.50x = 9,448,202,713.95
  5. Step 5: Solve for x
    x = 9,448,202,713.95/111,631.50
  6. Step 6: Final answer
    x = 84,637.43

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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.