Home / 134,699.76-185,872.98-78,105

Finding the Fourth Proportional to 134,699.76, 185,872.98 and 78,105

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Solution

The fourth proportional to 134,699.76, 185,872.98 and 78,105 is: 107,777.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,699.76 : 185,872.98 = 78,105 : x
  2. Step 2: Convert to fraction form
    134,699.76/185,872.98 = 78,105/x
  3. Step 3: Cross multiply
    134,699.76x = 185,872.98 × 78,105
  4. Step 4: Simplify right side
    134,699.76x = 14,517,609,102.90
  5. Step 5: Solve for x
    x = 14,517,609,102.90/134,699.76
  6. Step 6: Final answer
    x = 107,777.54

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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.