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Finding the Fourth Proportional to 40,090.68, 60,136.38 and 12,388.68

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Solution

The fourth proportional to 40,090.68, 60,136.38 and 12,388.68 is: 18,583.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,090.68 : 60,136.38 = 12,388.68 : x
  2. Step 2: Convert to fraction form
    40,090.68/60,136.38 = 12,388.68/x
  3. Step 3: Cross multiply
    40,090.68x = 60,136.38 × 12,388.68
  4. Step 4: Simplify right side
    40,090.68x = 745,010,368.18
  5. Step 5: Solve for x
    x = 745,010,368.18/40,090.68
  6. Step 6: Final answer
    x = 18,583.13

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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.