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Finding the Fourth Proportional to 121,808.16, 182,578.08 and 79,670.88

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Solution

The fourth proportional to 121,808.16, 182,578.08 and 79,670.88 is: 119,418.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,808.16 : 182,578.08 = 79,670.88 : x
  2. Step 2: Convert to fraction form
    121,808.16/182,578.08 = 79,670.88/x
  3. Step 3: Cross multiply
    121,808.16x = 182,578.08 × 79,670.88
  4. Step 4: Simplify right side
    121,808.16x = 14,546,156,302.31
  5. Step 5: Solve for x
    x = 14,546,156,302.31/121,808.16
  6. Step 6: Final answer
    x = 119,418.57

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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.