Home / 156,620.12-216,135.87-85,000.11

Finding the Fourth Proportional to 156,620.12, 216,135.87 and 85,000.11

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Solution

The fourth proportional to 156,620.12, 216,135.87 and 85,000.11 is: 117,300.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,620.12 : 216,135.87 = 85,000.11 : x
  2. Step 2: Convert to fraction form
    156,620.12/216,135.87 = 85,000.11/x
  3. Step 3: Cross multiply
    156,620.12x = 216,135.87 × 85,000.11
  4. Step 4: Simplify right side
    156,620.12x = 18,371,572,724.95
  5. Step 5: Solve for x
    x = 18,371,572,724.95/156,620.12
  6. Step 6: Final answer
    x = 117,300.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.