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Finding the Fourth Proportional to 64,385.80, 96,578.70 and 20,012.20

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Solution

The fourth proportional to 64,385.80, 96,578.70 and 20,012.20 is: 30,018.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,385.80 : 96,578.70 = 20,012.20 : x
  2. Step 2: Convert to fraction form
    64,385.80/96,578.70 = 20,012.20/x
  3. Step 3: Cross multiply
    64,385.80x = 96,578.70 × 20,012.20
  4. Step 4: Simplify right side
    64,385.80x = 1,932,752,260.14
  5. Step 5: Solve for x
    x = 1,932,752,260.14/64,385.80
  6. Step 6: Final answer
    x = 30,018.30

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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.