Home / 198,513.11-297,602.19-86,108.72

Finding the Fourth Proportional to 198,513.11, 297,602.19 and 86,108.72

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Solution

The fourth proportional to 198,513.11, 297,602.19 and 86,108.72 is: 129,090.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,513.11 : 297,602.19 = 86,108.72 : x
  2. Step 2: Convert to fraction form
    198,513.11/297,602.19 = 86,108.72/x
  3. Step 3: Cross multiply
    198,513.11x = 297,602.19 × 86,108.72
  4. Step 4: Simplify right side
    198,513.11x = 25,626,142,162.09
  5. Step 5: Solve for x
    x = 25,626,142,162.09/198,513.11
  6. Step 6: Final answer
    x = 129,090.43

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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.