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Finding the Fourth Proportional to 316,545.09, 474,864.42 and 91,876.41

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Solution

The fourth proportional to 316,545.09, 474,864.42 and 91,876.41 is: 137,828.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,545.09 : 474,864.42 = 91,876.41 : x
  2. Step 2: Convert to fraction form
    316,545.09/474,864.42 = 91,876.41/x
  3. Step 3: Cross multiply
    316,545.09x = 474,864.42 × 91,876.41
  4. Step 4: Simplify right side
    316,545.09x = 43,628,838,146.33
  5. Step 5: Solve for x
    x = 43,628,838,146.33/316,545.09
  6. Step 6: Final answer
    x = 137,828.19

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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.