Home / 156,839.81-216,439.83-85,220.42

Finding the Fourth Proportional to 156,839.81, 216,439.83 and 85,220.42

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Solution

The fourth proportional to 156,839.81, 216,439.83 and 85,220.42 is: 117,604.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,839.81 : 216,439.83 = 85,220.42 : x
  2. Step 2: Convert to fraction form
    156,839.81/216,439.83 = 85,220.42/x
  3. Step 3: Cross multiply
    156,839.81x = 216,439.83 × 85,220.42
  4. Step 4: Simplify right side
    156,839.81x = 18,445,092,135.13
  5. Step 5: Solve for x
    x = 18,445,092,135.13/156,839.81
  6. Step 6: Final answer
    x = 117,604.66

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1.5x scale

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.