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Finding the Fourth Proportional to 72,118.98, 99,447.75 and 49,490.97

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Solution

The fourth proportional to 72,118.98, 99,447.75 and 49,490.97 is: 68,245.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,118.98 : 99,447.75 = 49,490.97 : x
  2. Step 2: Convert to fraction form
    72,118.98/99,447.75 = 49,490.97/x
  3. Step 3: Cross multiply
    72,118.98x = 99,447.75 × 49,490.97
  4. Step 4: Simplify right side
    72,118.98x = 4,921,765,611.82
  5. Step 5: Solve for x
    x = 4,921,765,611.82/72,118.98
  6. Step 6: Final answer
    x = 68,245.08

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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.