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Finding the Fourth Proportional to 268,878.42, 403,341.93 and 79,338.42

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Solution

The fourth proportional to 268,878.42, 403,341.93 and 79,338.42 is: 119,014.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,878.42 : 403,341.93 = 79,338.42 : x
  2. Step 2: Convert to fraction form
    268,878.42/403,341.93 = 79,338.42/x
  3. Step 3: Cross multiply
    268,878.42x = 403,341.93 × 79,338.42
  4. Step 4: Simplify right side
    268,878.42x = 32,000,511,445.95
  5. Step 5: Solve for x
    x = 32,000,511,445.95/268,878.42
  6. Step 6: Final answer
    x = 119,014.80

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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.