Home / 76,913.40-115,305.30-39,977.40

Finding the Fourth Proportional to 76,913.40, 115,305.30 and 39,977.40

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Solution

The fourth proportional to 76,913.40, 115,305.30 and 39,977.40 is: 59,932.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,913.40 : 115,305.30 = 39,977.40 : x
  2. Step 2: Convert to fraction form
    76,913.40/115,305.30 = 39,977.40/x
  3. Step 3: Cross multiply
    76,913.40x = 115,305.30 × 39,977.40
  4. Step 4: Simplify right side
    76,913.40x = 4,609,606,100.22
  5. Step 5: Solve for x
    x = 4,609,606,100.22/76,913.40
  6. Step 6: Final answer
    x = 59,932.42

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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.