Home / 156,748.48-216,311.04-85,129.60

Finding the Fourth Proportional to 156,748.48, 216,311.04 and 85,129.60

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Solution

The fourth proportional to 156,748.48, 216,311.04 and 85,129.60 is: 117,477.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,748.48 : 216,311.04 = 85,129.60 : x
  2. Step 2: Convert to fraction form
    156,748.48/216,311.04 = 85,129.60/x
  3. Step 3: Cross multiply
    156,748.48x = 216,311.04 × 85,129.60
  4. Step 4: Simplify right side
    156,748.48x = 18,414,472,310.78
  5. Step 5: Solve for x
    x = 18,414,472,310.78/156,748.48
  6. Step 6: Final answer
    x = 117,477.84

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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.