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Finding the Fourth Proportional to 156,154.89, 215,493.81 and 84,534.91

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Solution

The fourth proportional to 156,154.89, 215,493.81 and 84,534.91 is: 116,658.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,154.89 : 215,493.81 = 84,534.91 : x
  2. Step 2: Convert to fraction form
    156,154.89/215,493.81 = 84,534.91/x
  3. Step 3: Cross multiply
    156,154.89x = 215,493.81 × 84,534.91
  4. Step 4: Simplify right side
    156,154.89x = 18,216,749,833.91
  5. Step 5: Solve for x
    x = 18,216,749,833.91/156,154.89
  6. Step 6: Final answer
    x = 116,658.21

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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.