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Finding the Fourth Proportional to 61,680.24, 91,979.28 and 61,119.24

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Solution

The fourth proportional to 61,680.24, 91,979.28 and 61,119.24 is: 91,142.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,680.24 : 91,979.28 = 61,119.24 : x
  2. Step 2: Convert to fraction form
    61,680.24/91,979.28 = 61,119.24/x
  3. Step 3: Cross multiply
    61,680.24x = 91,979.28 × 61,119.24
  4. Step 4: Simplify right side
    61,680.24x = 5,621,703,689.35
  5. Step 5: Solve for x
    x = 5,621,703,689.35/61,680.24
  6. Step 6: Final answer
    x = 91,142.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.