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Finding the Fourth Proportional to 133,291.31, 183,941.58 and 72,861.96

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Solution

The fourth proportional to 133,291.31, 183,941.58 and 72,861.96 is: 100,549.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,291.31 : 183,941.58 = 72,861.96 : x
  2. Step 2: Convert to fraction form
    133,291.31/183,941.58 = 72,861.96/x
  3. Step 3: Cross multiply
    133,291.31x = 183,941.58 × 72,861.96
  4. Step 4: Simplify right side
    133,291.31x = 13,402,345,007.31
  5. Step 5: Solve for x
    x = 13,402,345,007.31/133,291.31
  6. Step 6: Final answer
    x = 100,549.28

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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.