Home / 156,721.10-235,182.45-86,650.70

Finding the Fourth Proportional to 156,721.10, 235,182.45 and 86,650.70

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Solution

The fourth proportional to 156,721.10, 235,182.45 and 86,650.70 is: 130,031.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,721.10 : 235,182.45 = 86,650.70 : x
  2. Step 2: Convert to fraction form
    156,721.10/235,182.45 = 86,650.70/x
  3. Step 3: Cross multiply
    156,721.10x = 235,182.45 × 86,650.70
  4. Step 4: Simplify right side
    156,721.10x = 20,378,723,920.22
  5. Step 5: Solve for x
    x = 20,378,723,920.22/156,721.10
  6. Step 6: Final answer
    x = 130,031.78

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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.