Home / 76,919.46-115,373.71-20,762.77

Finding the Fourth Proportional to 76,919.46, 115,373.71 and 20,762.77

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Solution

The fourth proportional to 76,919.46, 115,373.71 and 20,762.77 is: 31,142.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,919.46 : 115,373.71 = 20,762.77 : x
  2. Step 2: Convert to fraction form
    76,919.46/115,373.71 = 20,762.77/x
  3. Step 3: Cross multiply
    76,919.46x = 115,373.71 × 20,762.77
  4. Step 4: Simplify right side
    76,919.46x = 2,395,477,804.78
  5. Step 5: Solve for x
    x = 2,395,477,804.78/76,919.46
  6. Step 6: Final answer
    x = 31,142.68

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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.