Home / 131,438.25-181,355.09-77,725.53

Finding the Fourth Proportional to 131,438.25, 181,355.09 and 77,725.53

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Solution

The fourth proportional to 131,438.25, 181,355.09 and 77,725.53 is: 107,243.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,438.25 : 181,355.09 = 77,725.53 : x
  2. Step 2: Convert to fraction form
    131,438.25/181,355.09 = 77,725.53/x
  3. Step 3: Cross multiply
    131,438.25x = 181,355.09 × 77,725.53
  4. Step 4: Simplify right side
    131,438.25x = 14,095,920,099.82
  5. Step 5: Solve for x
    x = 14,095,920,099.82/131,438.25
  6. Step 6: Final answer
    x = 107,243.67

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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.