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Finding the Fourth Proportional to 661,078.16, 991,537.28 and 181,345.01

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Solution

The fourth proportional to 661,078.16, 991,537.28 and 181,345.01 is: 271,995.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,078.16 : 991,537.28 = 181,345.01 : x
  2. Step 2: Convert to fraction form
    661,078.16/991,537.28 = 181,345.01/x
  3. Step 3: Cross multiply
    661,078.16x = 991,537.28 × 181,345.01
  4. Step 4: Simplify right side
    661,078.16x = 179,810,342,023.02
  5. Step 5: Solve for x
    x = 179,810,342,023.02/661,078.16
  6. Step 6: Final answer
    x = 271,995.59

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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.