Home / 42,121.20-63,154.80-19,905.60

Finding the Fourth Proportional to 42,121.20, 63,154.80 and 19,905.60

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Solution

The fourth proportional to 42,121.20, 63,154.80 and 19,905.60 is: 29,845.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,121.20 : 63,154.80 = 19,905.60 : x
  2. Step 2: Convert to fraction form
    42,121.20/63,154.80 = 19,905.60/x
  3. Step 3: Cross multiply
    42,121.20x = 63,154.80 × 19,905.60
  4. Step 4: Simplify right side
    42,121.20x = 1,257,134,186.88
  5. Step 5: Solve for x
    x = 1,257,134,186.88/42,121.20
  6. Step 6: Final answer
    x = 29,845.64

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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.