Home / 156,786.10-235,006.35-86,715.70

Finding the Fourth Proportional to 156,786.10, 235,006.35 and 86,715.70

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Solution

The fourth proportional to 156,786.10, 235,006.35 and 86,715.70 is: 129,977.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,786.10 : 235,006.35 = 86,715.70 : x
  2. Step 2: Convert to fraction form
    156,786.10/235,006.35 = 86,715.70/x
  3. Step 3: Cross multiply
    156,786.10x = 235,006.35 × 86,715.70
  4. Step 4: Simplify right side
    156,786.10x = 20,378,740,144.70
  5. Step 5: Solve for x
    x = 20,378,740,144.70/156,786.10
  6. Step 6: Final answer
    x = 129,977.98

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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.