Home / 100,943.40-139,315.30-57,939.88

Finding the Fourth Proportional to 100,943.40, 139,315.30 and 57,939.88

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Solution

The fourth proportional to 100,943.40, 139,315.30 and 57,939.88 is: 79,964.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,943.40 : 139,315.30 = 57,939.88 : x
  2. Step 2: Convert to fraction form
    100,943.40/139,315.30 = 57,939.88/x
  3. Step 3: Cross multiply
    100,943.40x = 139,315.30 × 57,939.88
  4. Step 4: Simplify right side
    100,943.40x = 8,071,911,764.16
  5. Step 5: Solve for x
    x = 8,071,911,764.16/100,943.40
  6. Step 6: Final answer
    x = 79,964.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.