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Finding the Fourth Proportional to 218,937.85, 328,420.65 and 92,561.47

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Solution

The fourth proportional to 218,937.85, 328,420.65 and 92,561.47 is: 138,848.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,937.85 : 328,420.65 = 92,561.47 : x
  2. Step 2: Convert to fraction form
    218,937.85/328,420.65 = 92,561.47/x
  3. Step 3: Cross multiply
    218,937.85x = 328,420.65 × 92,561.47
  4. Step 4: Simplify right side
    218,937.85x = 30,399,098,142.36
  5. Step 5: Solve for x
    x = 30,399,098,142.36/218,937.85
  6. Step 6: Final answer
    x = 138,848.07

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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.