Home / 156,792.10-235,015.35-86,721.70

Finding the Fourth Proportional to 156,792.10, 235,015.35 and 86,721.70

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Solution

The fourth proportional to 156,792.10, 235,015.35 and 86,721.70 is: 129,986.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,792.10 : 235,015.35 = 86,721.70 : x
  2. Step 2: Convert to fraction form
    156,792.10/235,015.35 = 86,721.70/x
  3. Step 3: Cross multiply
    156,792.10x = 235,015.35 × 86,721.70
  4. Step 4: Simplify right side
    156,792.10x = 20,380,930,678.10
  5. Step 5: Solve for x
    x = 20,380,930,678.10/156,792.10
  6. Step 6: Final answer
    x = 129,986.97

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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.