Home / 137,778.98-190,121.85-77,335.76

Finding the Fourth Proportional to 137,778.98, 190,121.85 and 77,335.76

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Solution

The fourth proportional to 137,778.98, 190,121.85 and 77,335.76 is: 106,715.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,778.98 : 190,121.85 = 77,335.76 : x
  2. Step 2: Convert to fraction form
    137,778.98/190,121.85 = 77,335.76/x
  3. Step 3: Cross multiply
    137,778.98x = 190,121.85 × 77,335.76
  4. Step 4: Simplify right side
    137,778.98x = 14,703,216,811.75
  5. Step 5: Solve for x
    x = 14,703,216,811.75/137,778.98
  6. Step 6: Final answer
    x = 106,715.97

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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.