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Finding the Fourth Proportional to 133,293.81, 183,945.50 and 72,864.72

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Solution

The fourth proportional to 133,293.81, 183,945.50 and 72,864.72 is: 100,553.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,293.81 : 183,945.50 = 72,864.72 : x
  2. Step 2: Convert to fraction form
    133,293.81/183,945.50 = 72,864.72/x
  3. Step 3: Cross multiply
    133,293.81x = 183,945.50 × 72,864.72
  4. Step 4: Simplify right side
    133,293.81x = 13,403,137,352.76
  5. Step 5: Solve for x
    x = 13,403,137,352.76/133,293.81
  6. Step 6: Final answer
    x = 100,553.34

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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.