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Finding the Fourth Proportional to 99,611.84, 137,598.94 and 79,608.92

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Solution

The fourth proportional to 99,611.84, 137,598.94 and 79,608.92 is: 109,967.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,611.84 : 137,598.94 = 79,608.92 : x
  2. Step 2: Convert to fraction form
    99,611.84/137,598.94 = 79,608.92/x
  3. Step 3: Cross multiply
    99,611.84x = 137,598.94 × 79,608.92
  4. Step 4: Simplify right side
    99,611.84x = 10,954,103,006.54
  5. Step 5: Solve for x
    x = 10,954,103,006.54/99,611.84
  6. Step 6: Final answer
    x = 109,967.88

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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.