Home / 77,121.72-115,603.78-43,771.32

Finding the Fourth Proportional to 77,121.72, 115,603.78 and 43,771.32

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Solution

The fourth proportional to 77,121.72, 115,603.78 and 43,771.32 is: 65,612.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,121.72 : 115,603.78 = 43,771.32 : x
  2. Step 2: Convert to fraction form
    77,121.72/115,603.78 = 43,771.32/x
  3. Step 3: Cross multiply
    77,121.72x = 115,603.78 × 43,771.32
  4. Step 4: Simplify right side
    77,121.72x = 5,060,130,047.59
  5. Step 5: Solve for x
    x = 5,060,130,047.59/77,121.72
  6. Step 6: Final answer
    x = 65,612.26

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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.