Home / 156,781.10-234,998.85-86,710.70

Finding the Fourth Proportional to 156,781.10, 234,998.85 and 86,710.70

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Solution

The fourth proportional to 156,781.10, 234,998.85 and 86,710.70 is: 129,970.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,781.10 : 234,998.85 = 86,710.70 : x
  2. Step 2: Convert to fraction form
    156,781.10/234,998.85 = 86,710.70/x
  3. Step 3: Cross multiply
    156,781.10x = 234,998.85 × 86,710.70
  4. Step 4: Simplify right side
    156,781.10x = 20,376,914,782.70
  5. Step 5: Solve for x
    x = 20,376,914,782.70/156,781.10
  6. Step 6: Final answer
    x = 129,970.48

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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.