Home / 42,649.20-64,022.40-25,128.90

Finding the Fourth Proportional to 42,649.20, 64,022.40 and 25,128.90

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Solution

The fourth proportional to 42,649.20, 64,022.40 and 25,128.90 is: 37,721.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,649.20 : 64,022.40 = 25,128.90 : x
  2. Step 2: Convert to fraction form
    42,649.20/64,022.40 = 25,128.90/x
  3. Step 3: Cross multiply
    42,649.20x = 64,022.40 × 25,128.90
  4. Step 4: Simplify right side
    42,649.20x = 1,608,812,487.36
  5. Step 5: Solve for x
    x = 1,608,812,487.36/42,649.20
  6. Step 6: Final answer
    x = 37,721.99

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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.