Home / 156,560.40-215,906.16-105,581.42

Finding the Fourth Proportional to 156,560.40, 215,906.16 and 105,581.42

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Solution

The fourth proportional to 156,560.40, 215,906.16 and 105,581.42 is: 145,603.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,560.40 : 215,906.16 = 105,581.42 : x
  2. Step 2: Convert to fraction form
    156,560.40/215,906.16 = 105,581.42/x
  3. Step 3: Cross multiply
    156,560.40x = 215,906.16 × 105,581.42
  4. Step 4: Simplify right side
    156,560.40x = 22,795,678,959.55
  5. Step 5: Solve for x
    x = 22,795,678,959.55/156,560.40
  6. Step 6: Final answer
    x = 145,603.10

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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.