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Finding the Fourth Proportional to 85,909.38, 128,833.16 and 29,734.23

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Solution

The fourth proportional to 85,909.38, 128,833.16 and 29,734.23 is: 44,590.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,909.38 : 128,833.16 = 29,734.23 : x
  2. Step 2: Convert to fraction form
    85,909.38/128,833.16 = 29,734.23/x
  3. Step 3: Cross multiply
    85,909.38x = 128,833.16 × 29,734.23
  4. Step 4: Simplify right side
    85,909.38x = 3,830,754,662.40
  5. Step 5: Solve for x
    x = 3,830,754,662.40/85,909.38
  6. Step 6: Final answer
    x = 44,590.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.