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Finding the Fourth Proportional to 156,969.86, 216,622.78 and 85,354.80

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Solution

The fourth proportional to 156,969.86, 216,622.78 and 85,354.80 is: 117,792.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,969.86 : 216,622.78 = 85,354.80 : x
  2. Step 2: Convert to fraction form
    156,969.86/216,622.78 = 85,354.80/x
  3. Step 3: Cross multiply
    156,969.86x = 216,622.78 × 85,354.80
  4. Step 4: Simplify right side
    156,969.86x = 18,489,794,062.34
  5. Step 5: Solve for x
    x = 18,489,794,062.34/156,969.86
  6. Step 6: Final answer
    x = 117,792.00

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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.