Home / 76,918.88-115,485.64-39,504.78

Finding the Fourth Proportional to 76,918.88, 115,485.64 and 39,504.78

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Solution

The fourth proportional to 76,918.88, 115,485.64 and 39,504.78 is: 59,312.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,918.88 : 115,485.64 = 39,504.78 : x
  2. Step 2: Convert to fraction form
    76,918.88/115,485.64 = 39,504.78/x
  3. Step 3: Cross multiply
    76,918.88x = 115,485.64 × 39,504.78
  4. Step 4: Simplify right side
    76,918.88x = 4,562,234,702.60
  5. Step 5: Solve for x
    x = 4,562,234,702.60/76,918.88
  6. Step 6: Final answer
    x = 59,312.29

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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.