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Finding the Fourth Proportional to 660,078.20, 990,117.30 and 161,442.20

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Solution

The fourth proportional to 660,078.20, 990,117.30 and 161,442.20 is: 242,163.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,078.20 : 990,117.30 = 161,442.20 : x
  2. Step 2: Convert to fraction form
    660,078.20/990,117.30 = 161,442.20/x
  3. Step 3: Cross multiply
    660,078.20x = 990,117.30 × 161,442.20
  4. Step 4: Simplify right side
    660,078.20x = 159,846,715,170.06
  5. Step 5: Solve for x
    x = 159,846,715,170.06/660,078.20
  6. Step 6: Final answer
    x = 242,163.30

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Similar ratio
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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.