Home / 151,211.61-208,638.55-87,512.50

Finding the Fourth Proportional to 151,211.61, 208,638.55 and 87,512.50

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Solution

The fourth proportional to 151,211.61, 208,638.55 and 87,512.50 is: 120,747.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,211.61 : 208,638.55 = 87,512.50 : x
  2. Step 2: Convert to fraction form
    151,211.61/208,638.55 = 87,512.50/x
  3. Step 3: Cross multiply
    151,211.61x = 208,638.55 × 87,512.50
  4. Step 4: Simplify right side
    151,211.61x = 18,258,481,107.87
  5. Step 5: Solve for x
    x = 18,258,481,107.87/151,211.61
  6. Step 6: Final answer
    x = 120,747.88

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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.