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Finding the Fourth Proportional to 156,620.64, 216,134.69 and 85,000.71

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Solution

The fourth proportional to 156,620.64, 216,134.69 and 85,000.71 is: 117,300.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,620.64 : 216,134.69 = 85,000.71 : x
  2. Step 2: Convert to fraction form
    156,620.64/216,134.69 = 85,000.71/x
  3. Step 3: Cross multiply
    156,620.64x = 216,134.69 × 85,000.71
  4. Step 4: Simplify right side
    156,620.64x = 18,371,601,680.63
  5. Step 5: Solve for x
    x = 18,371,601,680.63/156,620.64
  6. Step 6: Final answer
    x = 117,300.00

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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.