Home / 156,811.74-216,400.38-85,191.81

Finding the Fourth Proportional to 156,811.74, 216,400.38 and 85,191.81

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Solution

The fourth proportional to 156,811.74, 216,400.38 and 85,191.81 is: 117,564.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,811.74 : 216,400.38 = 85,191.81 : x
  2. Step 2: Convert to fraction form
    156,811.74/216,400.38 = 85,191.81/x
  3. Step 3: Cross multiply
    156,811.74x = 216,400.38 × 85,191.81
  4. Step 4: Simplify right side
    156,811.74x = 18,435,540,056.89
  5. Step 5: Solve for x
    x = 18,435,540,056.89/156,811.74
  6. Step 6: Final answer
    x = 117,564.79

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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.