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Finding the Fourth Proportional to 156,785.76, 216,360.72 and 85,164.18

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Solution

The fourth proportional to 156,785.76, 216,360.72 and 85,164.18 is: 117,524.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,785.76 : 216,360.72 = 85,164.18 : x
  2. Step 2: Convert to fraction form
    156,785.76/216,360.72 = 85,164.18/x
  3. Step 3: Cross multiply
    156,785.76x = 216,360.72 × 85,164.18
  4. Step 4: Simplify right side
    156,785.76x = 18,426,183,303.01
  5. Step 5: Solve for x
    x = 18,426,183,303.01/156,785.76
  6. Step 6: Final answer
    x = 117,524.60

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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.