Home / 156,639.10-235,031.55-81,843.70

Finding the Fourth Proportional to 156,639.10, 235,031.55 and 81,843.70

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Solution

The fourth proportional to 156,639.10, 235,031.55 and 81,843.70 is: 122,803.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,639.10 : 235,031.55 = 81,843.70 : x
  2. Step 2: Convert to fraction form
    156,639.10/235,031.55 = 81,843.70/x
  3. Step 3: Cross multiply
    156,639.10x = 235,031.55 × 81,843.70
  4. Step 4: Simplify right side
    156,639.10x = 19,235,851,668.74
  5. Step 5: Solve for x
    x = 19,235,851,668.74/156,639.10
  6. Step 6: Final answer
    x = 122,803.64

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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.