Home / 156,961.90-216,601.50-85,339.45

Finding the Fourth Proportional to 156,961.90, 216,601.50 and 85,339.45

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Solution

The fourth proportional to 156,961.90, 216,601.50 and 85,339.45 is: 117,765.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,961.90 : 216,601.50 = 85,339.45 : x
  2. Step 2: Convert to fraction form
    156,961.90/216,601.50 = 85,339.45/x
  3. Step 3: Cross multiply
    156,961.90x = 216,601.50 × 85,339.45
  4. Step 4: Simplify right side
    156,961.90x = 18,484,652,879.18
  5. Step 5: Solve for x
    x = 18,484,652,879.18/156,961.90
  6. Step 6: Final answer
    x = 117,765.22

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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.