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Finding the Fourth Proportional to 124,642.71, 172,006.87 and 68,054.08

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Solution

The fourth proportional to 124,642.71, 172,006.87 and 68,054.08 is: 93,914.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,642.71 : 172,006.87 = 68,054.08 : x
  2. Step 2: Convert to fraction form
    124,642.71/172,006.87 = 68,054.08/x
  3. Step 3: Cross multiply
    124,642.71x = 172,006.87 × 68,054.08
  4. Step 4: Simplify right side
    124,642.71x = 11,705,769,291.53
  5. Step 5: Solve for x
    x = 11,705,769,291.53/124,642.71
  6. Step 6: Final answer
    x = 93,914.59

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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.