Home / 256,139.20-384,249.30-87,675.40

Finding the Fourth Proportional to 256,139.20, 384,249.30 and 87,675.40

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Solution

The fourth proportional to 256,139.20, 384,249.30 and 87,675.40 is: 131,526.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,139.20 : 384,249.30 = 87,675.40 : x
  2. Step 2: Convert to fraction form
    256,139.20/384,249.30 = 87,675.40/x
  3. Step 3: Cross multiply
    256,139.20x = 384,249.30 × 87,675.40
  4. Step 4: Simplify right side
    256,139.20x = 33,689,211,077.22
  5. Step 5: Solve for x
    x = 33,689,211,077.22/256,139.20
  6. Step 6: Final answer
    x = 131,526.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.