Home / 142,040.02-196,015-78,377.78

Finding the Fourth Proportional to 142,040.02, 196,015 and 78,377.78

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Solution

The fourth proportional to 142,040.02, 196,015 and 78,377.78 is: 108,161.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,040.02 : 196,015 = 78,377.78 : x
  2. Step 2: Convert to fraction form
    142,040.02/196,015 = 78,377.78/x
  3. Step 3: Cross multiply
    142,040.02x = 196,015 × 78,377.78
  4. Step 4: Simplify right side
    142,040.02x = 15,363,220,546.70
  5. Step 5: Solve for x
    x = 15,363,220,546.70/142,040.02
  6. Step 6: Final answer
    x = 108,161.21

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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.