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Finding the Fourth Proportional to 103,660.58, 155,261.16 and 84,611.81

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Solution

The fourth proportional to 103,660.58, 155,261.16 and 84,611.81 is: 126,730.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,660.58 : 155,261.16 = 84,611.81 : x
  2. Step 2: Convert to fraction form
    103,660.58/155,261.16 = 84,611.81/x
  3. Step 3: Cross multiply
    103,660.58x = 155,261.16 × 84,611.81
  4. Step 4: Simplify right side
    103,660.58x = 13,136,926,993.99
  5. Step 5: Solve for x
    x = 13,136,926,993.99/103,660.58
  6. Step 6: Final answer
    x = 126,730.22

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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.