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Finding the Fourth Proportional to 156,641.04, 216,164.82 and 85,021.04

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Solution

The fourth proportional to 156,641.04, 216,164.82 and 85,021.04 is: 117,329.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,641.04 : 216,164.82 = 85,021.04 : x
  2. Step 2: Convert to fraction form
    156,641.04/216,164.82 = 85,021.04/x
  3. Step 3: Cross multiply
    156,641.04x = 216,164.82 × 85,021.04
  4. Step 4: Simplify right side
    156,641.04x = 18,378,557,807.81
  5. Step 5: Solve for x
    x = 18,378,557,807.81/156,641.04
  6. Step 6: Final answer
    x = 117,329.14

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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.