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Finding the Fourth Proportional to 74,492.91, 111,739.08 and 30,119.13

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Solution

The fourth proportional to 74,492.91, 111,739.08 and 30,119.13 is: 45,178.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,492.91 : 111,739.08 = 30,119.13 : x
  2. Step 2: Convert to fraction form
    74,492.91/111,739.08 = 30,119.13/x
  3. Step 3: Cross multiply
    74,492.91x = 111,739.08 × 30,119.13
  4. Step 4: Simplify right side
    74,492.91x = 3,365,483,876.60
  5. Step 5: Solve for x
    x = 3,365,483,876.60/74,492.91
  6. Step 6: Final answer
    x = 45,178.58

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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.