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Finding the Fourth Proportional to 123,670.80, 185,506.20 and 79,384.05

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Solution

The fourth proportional to 123,670.80, 185,506.20 and 79,384.05 is: 119,076.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,670.80 : 185,506.20 = 79,384.05 : x
  2. Step 2: Convert to fraction form
    123,670.80/185,506.20 = 79,384.05/x
  3. Step 3: Cross multiply
    123,670.80x = 185,506.20 × 79,384.05
  4. Step 4: Simplify right side
    123,670.80x = 14,726,233,456.11
  5. Step 5: Solve for x
    x = 14,726,233,456.11/123,670.80
  6. Step 6: Final answer
    x = 119,076.08

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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.