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Finding the Fourth Proportional to 156,637.89, 216,160.31 and 85,017.89

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Solution

The fourth proportional to 156,637.89, 216,160.31 and 85,017.89 is: 117,324.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,637.89 : 216,160.31 = 85,017.89 : x
  2. Step 2: Convert to fraction form
    156,637.89/216,160.31 = 85,017.89/x
  3. Step 3: Cross multiply
    156,637.89x = 216,160.31 × 85,017.89
  4. Step 4: Simplify right side
    156,637.89x = 18,377,493,457.95
  5. Step 5: Solve for x
    x = 18,377,493,457.95/156,637.89
  6. Step 6: Final answer
    x = 117,324.70

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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.