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Finding the Fourth Proportional to 85,894.77, 128,854.31 and 33,309.57

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Solution

The fourth proportional to 85,894.77, 128,854.31 and 33,309.57 is: 49,969.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,894.77 : 128,854.31 = 33,309.57 : x
  2. Step 2: Convert to fraction form
    85,894.77/128,854.31 = 33,309.57/x
  3. Step 3: Cross multiply
    85,894.77x = 128,854.31 × 33,309.57
  4. Step 4: Simplify right side
    85,894.77x = 4,292,081,492.20
  5. Step 5: Solve for x
    x = 4,292,081,492.20/85,894.77
  6. Step 6: Final answer
    x = 49,969.07

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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.