Home / 42,775.60-64,120.20-19,418.80

Finding the Fourth Proportional to 42,775.60, 64,120.20 and 19,418.80

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Solution

The fourth proportional to 42,775.60, 64,120.20 and 19,418.80 is: 29,108.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,775.60 : 64,120.20 = 19,418.80 : x
  2. Step 2: Convert to fraction form
    42,775.60/64,120.20 = 19,418.80/x
  3. Step 3: Cross multiply
    42,775.60x = 64,120.20 × 19,418.80
  4. Step 4: Simplify right side
    42,775.60x = 1,245,137,339.76
  5. Step 5: Solve for x
    x = 1,245,137,339.76/42,775.60
  6. Step 6: Final answer
    x = 29,108.59

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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.