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Finding the Fourth Proportional to 156,990.68, 216,648.66 and 85,372.25

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Solution

The fourth proportional to 156,990.68, 216,648.66 and 85,372.25 is: 117,814.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,990.68 : 216,648.66 = 85,372.25 : x
  2. Step 2: Convert to fraction form
    156,990.68/216,648.66 = 85,372.25/x
  3. Step 3: Cross multiply
    156,990.68x = 216,648.66 × 85,372.25
  4. Step 4: Simplify right side
    156,990.68x = 18,495,782,480.44
  5. Step 5: Solve for x
    x = 18,495,782,480.44/156,990.68
  6. Step 6: Final answer
    x = 117,814.53

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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.