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Finding the Fourth Proportional to 156,989.60, 216,649.74 and 85,373.80

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Solution

The fourth proportional to 156,989.60, 216,649.74 and 85,373.80 is: 117,818.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,989.60 : 216,649.74 = 85,373.80 : x
  2. Step 2: Convert to fraction form
    156,989.60/216,649.74 = 85,373.80/x
  3. Step 3: Cross multiply
    156,989.60x = 216,649.74 × 85,373.80
  4. Step 4: Simplify right side
    156,989.60x = 18,496,211,572.81
  5. Step 5: Solve for x
    x = 18,496,211,572.81/156,989.60
  6. Step 6: Final answer
    x = 117,818.07

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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.