Home / 77,420.88-116,138.52-21,261.60

Finding the Fourth Proportional to 77,420.88, 116,138.52 and 21,261.60

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Solution

The fourth proportional to 77,420.88, 116,138.52 and 21,261.60 is: 31,894.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,420.88 : 116,138.52 = 21,261.60 : x
  2. Step 2: Convert to fraction form
    77,420.88/116,138.52 = 21,261.60/x
  3. Step 3: Cross multiply
    77,420.88x = 116,138.52 × 21,261.60
  4. Step 4: Simplify right side
    77,420.88x = 2,469,290,756.83
  5. Step 5: Solve for x
    x = 2,469,290,756.83/77,420.88
  6. Step 6: Final answer
    x = 31,894.38

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1.5x scale

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.