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Finding the Fourth Proportional to 111,960.36, 154,504.62 and 61,659

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Solution

The fourth proportional to 111,960.36, 154,504.62 and 61,659 is: 85,089.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,960.36 : 154,504.62 = 61,659 : x
  2. Step 2: Convert to fraction form
    111,960.36/154,504.62 = 61,659/x
  3. Step 3: Cross multiply
    111,960.36x = 154,504.62 × 61,659
  4. Step 4: Simplify right side
    111,960.36x = 9,526,600,364.58
  5. Step 5: Solve for x
    x = 9,526,600,364.58/111,960.36
  6. Step 6: Final answer
    x = 85,089.05

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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.