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Finding the Fourth Proportional to 156,634.79, 216,156.21 and 85,014.81

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Solution

The fourth proportional to 156,634.79, 216,156.21 and 85,014.81 is: 117,320.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,634.79 : 216,156.21 = 85,014.81 : x
  2. Step 2: Convert to fraction form
    156,634.79/216,156.21 = 85,014.81/x
  3. Step 3: Cross multiply
    156,634.79x = 216,156.21 × 85,014.81
  4. Step 4: Simplify right side
    156,634.79x = 18,376,479,123.47
  5. Step 5: Solve for x
    x = 18,376,479,123.47/156,634.79
  6. Step 6: Final answer
    x = 117,320.55

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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.