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Finding the Fourth Proportional to 85,209.75, 127,213.65 and 65,113.11

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Solution

The fourth proportional to 85,209.75, 127,213.65 and 65,113.11 is: 97,210.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,209.75 : 127,213.65 = 65,113.11 : x
  2. Step 2: Convert to fraction form
    85,209.75/127,213.65 = 65,113.11/x
  3. Step 3: Cross multiply
    85,209.75x = 127,213.65 × 65,113.11
  4. Step 4: Simplify right side
    85,209.75x = 8,283,276,385.95
  5. Step 5: Solve for x
    x = 8,283,276,385.95/85,209.75
  6. Step 6: Final answer
    x = 97,210.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.