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Finding the Fourth Proportional to 123,570.95, 185,357.40 and 80,912.33

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Solution

The fourth proportional to 123,570.95, 185,357.40 and 80,912.33 is: 121,369.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,570.95 : 185,357.40 = 80,912.33 : x
  2. Step 2: Convert to fraction form
    123,570.95/185,357.40 = 80,912.33/x
  3. Step 3: Cross multiply
    123,570.95x = 185,357.40 × 80,912.33
  4. Step 4: Simplify right side
    123,570.95x = 14,997,698,581.62
  5. Step 5: Solve for x
    x = 14,997,698,581.62/123,570.95
  6. Step 6: Final answer
    x = 121,369.13

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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.