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Finding the Fourth Proportional to 155,006.56, 213,916.08 and 91,347.04

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Solution

The fourth proportional to 155,006.56, 213,916.08 and 91,347.04 is: 126,063.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,006.56 : 213,916.08 = 91,347.04 : x
  2. Step 2: Convert to fraction form
    155,006.56/213,916.08 = 91,347.04/x
  3. Step 3: Cross multiply
    155,006.56x = 213,916.08 × 91,347.04
  4. Step 4: Simplify right side
    155,006.56x = 19,540,600,716.40
  5. Step 5: Solve for x
    x = 19,540,600,716.40/155,006.56
  6. Step 6: Final answer
    x = 126,063.06

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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.