Home / 133,128.56-183,717.52-85,381.76

Finding the Fourth Proportional to 133,128.56, 183,717.52 and 85,381.76

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Solution

The fourth proportional to 133,128.56, 183,717.52 and 85,381.76 is: 117,826.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,128.56 : 183,717.52 = 85,381.76 : x
  2. Step 2: Convert to fraction form
    133,128.56/183,717.52 = 85,381.76/x
  3. Step 3: Cross multiply
    133,128.56x = 183,717.52 × 85,381.76
  4. Step 4: Simplify right side
    133,128.56x = 15,686,125,200.44
  5. Step 5: Solve for x
    x = 15,686,125,200.44/133,128.56
  6. Step 6: Final answer
    x = 117,826.90

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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.