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Finding the Fourth Proportional to 66,015.90, 98,889.45 and 40,979.10

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Solution

The fourth proportional to 66,015.90, 98,889.45 and 40,979.10 is: 61,385.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,015.90 : 98,889.45 = 40,979.10 : x
  2. Step 2: Convert to fraction form
    66,015.90/98,889.45 = 40,979.10/x
  3. Step 3: Cross multiply
    66,015.90x = 98,889.45 × 40,979.10
  4. Step 4: Simplify right side
    66,015.90x = 4,052,400,660.50
  5. Step 5: Solve for x
    x = 4,052,400,660.50/66,015.90
  6. Step 6: Final answer
    x = 61,385.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.