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Finding the Fourth Proportional to 156,698.34, 216,255.15 and 87,793.85

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Solution

The fourth proportional to 156,698.34, 216,255.15 and 87,793.85 is: 121,161.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,698.34 : 216,255.15 = 87,793.85 : x
  2. Step 2: Convert to fraction form
    156,698.34/216,255.15 = 87,793.85/x
  3. Step 3: Cross multiply
    156,698.34x = 216,255.15 × 87,793.85
  4. Step 4: Simplify right side
    156,698.34x = 18,985,871,119.55
  5. Step 5: Solve for x
    x = 18,985,871,119.55/156,698.34
  6. Step 6: Final answer
    x = 121,161.92

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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.