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Finding the Fourth Proportional to 149,879.61, 206,841.74 and 86,226.98

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Solution

The fourth proportional to 149,879.61, 206,841.74 and 86,226.98 is: 118,997.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,879.61 : 206,841.74 = 86,226.98 : x
  2. Step 2: Convert to fraction form
    149,879.61/206,841.74 = 86,226.98/x
  3. Step 3: Cross multiply
    149,879.61x = 206,841.74 × 86,226.98
  4. Step 4: Simplify right side
    149,879.61x = 17,835,337,112.80
  5. Step 5: Solve for x
    x = 17,835,337,112.80/149,879.61
  6. Step 6: Final answer
    x = 118,997.76

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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.