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Finding the Fourth Proportional to 133,073.40, 183,641.81 and 72,645.38

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Solution

The fourth proportional to 133,073.40, 183,641.81 and 72,645.38 is: 100,250.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,073.40 : 183,641.81 = 72,645.38 : x
  2. Step 2: Convert to fraction form
    133,073.40/183,641.81 = 72,645.38/x
  3. Step 3: Cross multiply
    133,073.40x = 183,641.81 × 72,645.38
  4. Step 4: Simplify right side
    133,073.40x = 13,340,729,071.34
  5. Step 5: Solve for x
    x = 13,340,729,071.34/133,073.40
  6. Step 6: Final answer
    x = 100,250.91

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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.