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Finding the Fourth Proportional to 156,970.56, 216,622.08 and 85,351.08

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Solution

The fourth proportional to 156,970.56, 216,622.08 and 85,351.08 is: 117,785.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,970.56 : 216,622.08 = 85,351.08 : x
  2. Step 2: Convert to fraction form
    156,970.56/216,622.08 = 85,351.08/x
  3. Step 3: Cross multiply
    156,970.56x = 216,622.08 × 85,351.08
  4. Step 4: Simplify right side
    156,970.56x = 18,488,928,479.85
  5. Step 5: Solve for x
    x = 18,488,928,479.85/156,970.56
  6. Step 6: Final answer
    x = 117,785.96

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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.