Home / 133,146.11-183,740.70-72,716.78

Finding the Fourth Proportional to 133,146.11, 183,740.70 and 72,716.78

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Solution

The fourth proportional to 133,146.11, 183,740.70 and 72,716.78 is: 100,348.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,146.11 : 183,740.70 = 72,716.78 : x
  2. Step 2: Convert to fraction form
    133,146.11/183,740.70 = 72,716.78/x
  3. Step 3: Cross multiply
    133,146.11x = 183,740.70 × 72,716.78
  4. Step 4: Simplify right side
    133,146.11x = 13,361,031,140.24
  5. Step 5: Solve for x
    x = 13,361,031,140.24/133,146.11
  6. Step 6: Final answer
    x = 100,348.64

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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.