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Finding the Fourth Proportional to 120,071.48, 180,107.22 and 45,208.42

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Solution

The fourth proportional to 120,071.48, 180,107.22 and 45,208.42 is: 67,812.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,071.48 : 180,107.22 = 45,208.42 : x
  2. Step 2: Convert to fraction form
    120,071.48/180,107.22 = 45,208.42/x
  3. Step 3: Cross multiply
    120,071.48x = 180,107.22 × 45,208.42
  4. Step 4: Simplify right side
    120,071.48x = 8,142,362,846.79
  5. Step 5: Solve for x
    x = 8,142,362,846.79/120,071.48
  6. Step 6: Final answer
    x = 67,812.63

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1.5x scale

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.