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Finding the Fourth Proportional to 84,657.10, 126,986.73 and 58,354.78

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Solution

The fourth proportional to 84,657.10, 126,986.73 and 58,354.78 is: 87,532.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,657.10 : 126,986.73 = 58,354.78 : x
  2. Step 2: Convert to fraction form
    84,657.10/126,986.73 = 58,354.78/x
  3. Step 3: Cross multiply
    84,657.10x = 126,986.73 × 58,354.78
  4. Step 4: Simplify right side
    84,657.10x = 7,410,282,692.07
  5. Step 5: Solve for x
    x = 7,410,282,692.07/84,657.10
  6. Step 6: Final answer
    x = 87,532.91

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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.