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Finding the Fourth Proportional to 104,781.60, 144,682.20 and 83,786.40

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Solution

The fourth proportional to 104,781.60, 144,682.20 and 83,786.40 is: 115,692.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,781.60 : 144,682.20 = 83,786.40 : x
  2. Step 2: Convert to fraction form
    104,781.60/144,682.20 = 83,786.40/x
  3. Step 3: Cross multiply
    104,781.60x = 144,682.20 × 83,786.40
  4. Step 4: Simplify right side
    104,781.60x = 12,122,400,682.08
  5. Step 5: Solve for x
    x = 12,122,400,682.08/104,781.60
  6. Step 6: Final answer
    x = 115,692.07

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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.