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Finding the Fourth Proportional to 42,710.22, 64,079.03 and 20,525.20

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Solution

The fourth proportional to 42,710.22, 64,079.03 and 20,525.20 is: 30,794.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,710.22 : 64,079.03 = 20,525.20 : x
  2. Step 2: Convert to fraction form
    42,710.22/64,079.03 = 20,525.20/x
  3. Step 3: Cross multiply
    42,710.22x = 64,079.03 × 20,525.20
  4. Step 4: Simplify right side
    42,710.22x = 1,315,234,797.67
  5. Step 5: Solve for x
    x = 1,315,234,797.67/42,710.22
  6. Step 6: Final answer
    x = 30,794.38

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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.