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Finding the Fourth Proportional to 131,473.89, 181,389.65 and 74,845.17

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Solution

The fourth proportional to 131,473.89, 181,389.65 and 74,845.17 is: 103,261.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,473.89 : 181,389.65 = 74,845.17 : x
  2. Step 2: Convert to fraction form
    131,473.89/181,389.65 = 74,845.17/x
  3. Step 3: Cross multiply
    131,473.89x = 181,389.65 × 74,845.17
  4. Step 4: Simplify right side
    131,473.89x = 13,576,138,816.26
  5. Step 5: Solve for x
    x = 13,576,138,816.26/131,473.89
  6. Step 6: Final answer
    x = 103,261.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.