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Finding the Fourth Proportional to 156,969.65, 216,612.19 and 85,347.20

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Solution

The fourth proportional to 156,969.65, 216,612.19 and 85,347.20 is: 117,775.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,969.65 : 216,612.19 = 85,347.20 : x
  2. Step 2: Convert to fraction form
    156,969.65/216,612.19 = 85,347.20/x
  3. Step 3: Cross multiply
    156,969.65x = 216,612.19 × 85,347.20
  4. Step 4: Simplify right side
    156,969.65x = 18,487,243,902.37
  5. Step 5: Solve for x
    x = 18,487,243,902.37/156,969.65
  6. Step 6: Final answer
    x = 117,775.91

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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.