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Finding the Fourth Proportional to 200,316.40, 300,328.80 and 81,926.80

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Solution

The fourth proportional to 200,316.40, 300,328.80 and 81,926.80 is: 122,830.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,316.40 : 300,328.80 = 81,926.80 : x
  2. Step 2: Convert to fraction form
    200,316.40/300,328.80 = 81,926.80/x
  3. Step 3: Cross multiply
    200,316.40x = 300,328.80 × 81,926.80
  4. Step 4: Simplify right side
    200,316.40x = 24,604,977,531.84
  5. Step 5: Solve for x
    x = 24,604,977,531.84/200,316.40
  6. Step 6: Final answer
    x = 122,830.57

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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.