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Finding the Fourth Proportional to 156,699.34, 216,256.53 and 87,794.85

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Solution

The fourth proportional to 156,699.34, 216,256.53 and 87,794.85 is: 121,163.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,699.34 : 216,256.53 = 87,794.85 : x
  2. Step 2: Convert to fraction form
    156,699.34/216,256.53 = 87,794.85/x
  3. Step 3: Cross multiply
    156,699.34x = 216,256.53 × 87,794.85
  4. Step 4: Simplify right side
    156,699.34x = 18,986,209,612.87
  5. Step 5: Solve for x
    x = 18,986,209,612.87/156,699.34
  6. Step 6: Final answer
    x = 121,163.30

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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.