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Finding the Fourth Proportional to 133,313.76, 183,977.88 and 72,888.48

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Solution

The fourth proportional to 133,313.76, 183,977.88 and 72,888.48 is: 100,588.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,313.76 : 183,977.88 = 72,888.48 : x
  2. Step 2: Convert to fraction form
    133,313.76/183,977.88 = 72,888.48/x
  3. Step 3: Cross multiply
    133,313.76x = 183,977.88 × 72,888.48
  4. Step 4: Simplify right side
    133,313.76x = 13,409,868,026.82
  5. Step 5: Solve for x
    x = 13,409,868,026.82/133,313.76
  6. Step 6: Final answer
    x = 100,588.78

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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.