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Finding the Fourth Proportional to 84,813.60, 127,220.40 and 70,039.20

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Solution

The fourth proportional to 84,813.60, 127,220.40 and 70,039.20 is: 105,058.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,813.60 : 127,220.40 = 70,039.20 : x
  2. Step 2: Convert to fraction form
    84,813.60/127,220.40 = 70,039.20/x
  3. Step 3: Cross multiply
    84,813.60x = 127,220.40 × 70,039.20
  4. Step 4: Simplify right side
    84,813.60x = 8,910,415,039.68
  5. Step 5: Solve for x
    x = 8,910,415,039.68/84,813.60
  6. Step 6: Final answer
    x = 105,058.80

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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.