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Finding the Fourth Proportional to 84,498.30, 126,747.45 and 76,722.30

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Solution

The fourth proportional to 84,498.30, 126,747.45 and 76,722.30 is: 115,083.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,498.30 : 126,747.45 = 76,722.30 : x
  2. Step 2: Convert to fraction form
    84,498.30/126,747.45 = 76,722.30/x
  3. Step 3: Cross multiply
    84,498.30x = 126,747.45 × 76,722.30
  4. Step 4: Simplify right side
    84,498.30x = 9,724,355,883.14
  5. Step 5: Solve for x
    x = 9,724,355,883.14/84,498.30
  6. Step 6: Final answer
    x = 115,083.45

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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.