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Finding the Fourth Proportional to 120,142.80, 180,230.40 and 41,281.20

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Solution

The fourth proportional to 120,142.80, 180,230.40 and 41,281.20 is: 61,927.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,142.80 : 180,230.40 = 41,281.20 : x
  2. Step 2: Convert to fraction form
    120,142.80/180,230.40 = 41,281.20/x
  3. Step 3: Cross multiply
    120,142.80x = 180,230.40 × 41,281.20
  4. Step 4: Simplify right side
    120,142.80x = 7,440,127,188.48
  5. Step 5: Solve for x
    x = 7,440,127,188.48/120,142.80
  6. Step 6: Final answer
    x = 61,927.37

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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.