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Finding the Fourth Proportional to 156,963.86, 216,614.50 and 85,348.80

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Solution

The fourth proportional to 156,963.86, 216,614.50 and 85,348.80 is: 117,783.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,963.86 : 216,614.50 = 85,348.80 : x
  2. Step 2: Convert to fraction form
    156,963.86/216,614.50 = 85,348.80/x
  3. Step 3: Cross multiply
    156,963.86x = 216,614.50 × 85,348.80
  4. Step 4: Simplify right side
    156,963.86x = 18,487,787,637.60
  5. Step 5: Solve for x
    x = 18,487,787,637.60/156,963.86
  6. Step 6: Final answer
    x = 117,783.72

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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.