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Finding the Fourth Proportional to 84,081,612.20, 126,122,418.30 and 84,081,612.20

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Solution

The fourth proportional to 84,081,612.20, 126,122,418.30 and 84,081,612.20 is: 126,122,418.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,081,612.20 : 126,122,418.30 = 84,081,612.20 : x
  2. Step 2: Convert to fraction form
    84,081,612.20/126,122,418.30 = 84,081,612.20/x
  3. Step 3: Cross multiply
    84,081,612.20x = 126,122,418.30 × 84,081,612.20
  4. Step 4: Simplify right side
    84,081,612.20x = 10,604,576,265,226,784
  5. Step 5: Solve for x
    x = 10,604,576,265,226,784/84,081,612.20
  6. Step 6: Final answer
    x = 126,122,418.30

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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.