Home / 281,136.68-421,705.02-81,457.20

Finding the Fourth Proportional to 281,136.68, 421,705.02 and 81,457.20

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Solution

The fourth proportional to 281,136.68, 421,705.02 and 81,457.20 is: 122,185.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,136.68 : 421,705.02 = 81,457.20 : x
  2. Step 2: Convert to fraction form
    281,136.68/421,705.02 = 81,457.20/x
  3. Step 3: Cross multiply
    281,136.68x = 421,705.02 × 81,457.20
  4. Step 4: Simplify right side
    281,136.68x = 34,350,910,155.14
  5. Step 5: Solve for x
    x = 34,350,910,155.14/281,136.68
  6. Step 6: Final answer
    x = 122,185.80

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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.