Home / 133,137.72-183,729.12-72,708.38

Finding the Fourth Proportional to 133,137.72, 183,729.12 and 72,708.38

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Solution

The fourth proportional to 133,137.72, 183,729.12 and 72,708.38 is: 100,337.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,137.72 : 183,729.12 = 72,708.38 : x
  2. Step 2: Convert to fraction form
    133,137.72/183,729.12 = 72,708.38/x
  3. Step 3: Cross multiply
    133,137.72x = 183,729.12 × 72,708.38
  4. Step 4: Simplify right side
    133,137.72x = 13,358,646,376.20
  5. Step 5: Solve for x
    x = 13,358,646,376.20/133,137.72
  6. Step 6: Final answer
    x = 100,337.05

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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.