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Finding the Fourth Proportional to 120,607.20, 180,941.12 and 70,728.96

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Solution

The fourth proportional to 120,607.20, 180,941.12 and 70,728.96 is: 106,111.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,607.20 : 180,941.12 = 70,728.96 : x
  2. Step 2: Convert to fraction form
    120,607.20/180,941.12 = 70,728.96/x
  3. Step 3: Cross multiply
    120,607.20x = 180,941.12 × 70,728.96
  4. Step 4: Simplify right side
    120,607.20x = 12,797,777,238.84
  5. Step 5: Solve for x
    x = 12,797,777,238.84/120,607.20
  6. Step 6: Final answer
    x = 106,111.22

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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.