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Finding the Fourth Proportional to 112,215.88, 154,861.15 and 61,918.12

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Solution

The fourth proportional to 112,215.88, 154,861.15 and 61,918.12 is: 85,448.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,215.88 : 154,861.15 = 61,918.12 : x
  2. Step 2: Convert to fraction form
    112,215.88/154,861.15 = 61,918.12/x
  3. Step 3: Cross multiply
    112,215.88x = 154,861.15 × 61,918.12
  4. Step 4: Simplify right side
    112,215.88x = 9,588,710,494.73
  5. Step 5: Solve for x
    x = 9,588,710,494.73/112,215.88
  6. Step 6: Final answer
    x = 85,448.79

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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.