Home / 70,581.02-105,862.82-20,660.58

Finding the Fourth Proportional to 70,581.02, 105,862.82 and 20,660.58

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Solution

The fourth proportional to 70,581.02, 105,862.82 and 20,660.58 is: 30,988.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,581.02 : 105,862.82 = 20,660.58 : x
  2. Step 2: Convert to fraction form
    70,581.02/105,862.82 = 20,660.58/x
  3. Step 3: Cross multiply
    70,581.02x = 105,862.82 × 20,660.58
  4. Step 4: Simplify right side
    70,581.02x = 2,187,187,158.33
  5. Step 5: Solve for x
    x = 2,187,187,158.33/70,581.02
  6. Step 6: Final answer
    x = 30,988.32

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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.