Home / 78,438.40-117,632.32-25,835.36

Finding the Fourth Proportional to 78,438.40, 117,632.32 and 25,835.36

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Solution

The fourth proportional to 78,438.40, 117,632.32 and 25,835.36 is: 38,744.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,438.40 : 117,632.32 = 25,835.36 : x
  2. Step 2: Convert to fraction form
    78,438.40/117,632.32 = 25,835.36/x
  3. Step 3: Cross multiply
    78,438.40x = 117,632.32 × 25,835.36
  4. Step 4: Simplify right side
    78,438.40x = 3,039,073,334.84
  5. Step 5: Solve for x
    x = 3,039,073,334.84/78,438.40
  6. Step 6: Final answer
    x = 38,744.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.