Home / 113,872.36-157,064.82-78,065.56

Finding the Fourth Proportional to 113,872.36, 157,064.82 and 78,065.56

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Solution

The fourth proportional to 113,872.36, 157,064.82 and 78,065.56 is: 107,676.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,872.36 : 157,064.82 = 78,065.56 : x
  2. Step 2: Convert to fraction form
    113,872.36/157,064.82 = 78,065.56/x
  3. Step 3: Cross multiply
    113,872.36x = 157,064.82 × 78,065.56
  4. Step 4: Simplify right side
    113,872.36x = 12,261,353,129.60
  5. Step 5: Solve for x
    x = 12,261,353,129.60/113,872.36
  6. Step 6: Final answer
    x = 107,676.29

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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.