Home / 156,905.78-216,530.01-85,285.85

Finding the Fourth Proportional to 156,905.78, 216,530.01 and 85,285.85

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Solution

The fourth proportional to 156,905.78, 216,530.01 and 85,285.85 is: 117,694.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,905.78 : 216,530.01 = 85,285.85 : x
  2. Step 2: Convert to fraction form
    156,905.78/216,530.01 = 85,285.85/x
  3. Step 3: Cross multiply
    156,905.78x = 216,530.01 × 85,285.85
  4. Step 4: Simplify right side
    156,905.78x = 18,466,944,870.71
  5. Step 5: Solve for x
    x = 18,466,944,870.71/156,905.78
  6. Step 6: Final answer
    x = 117,694.49

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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.