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Finding the Fourth Proportional to 111,382.12, 153,707.08 and 61,081

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Solution

The fourth proportional to 111,382.12, 153,707.08 and 61,081 is: 84,291.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,382.12 : 153,707.08 = 61,081 : x
  2. Step 2: Convert to fraction form
    111,382.12/153,707.08 = 61,081/x
  3. Step 3: Cross multiply
    111,382.12x = 153,707.08 × 61,081
  4. Step 4: Simplify right side
    111,382.12x = 9,388,582,153.48
  5. Step 5: Solve for x
    x = 9,388,582,153.48/111,382.12
  6. Step 6: Final answer
    x = 84,291.65

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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.