Home / 76,917.40-115,311.30-39,981.40

Finding the Fourth Proportional to 76,917.40, 115,311.30 and 39,981.40

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Solution

The fourth proportional to 76,917.40, 115,311.30 and 39,981.40 is: 59,938.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,917.40 : 115,311.30 = 39,981.40 : x
  2. Step 2: Convert to fraction form
    76,917.40/115,311.30 = 39,981.40/x
  3. Step 3: Cross multiply
    76,917.40x = 115,311.30 × 39,981.40
  4. Step 4: Simplify right side
    76,917.40x = 4,610,307,209.82
  5. Step 5: Solve for x
    x = 4,610,307,209.82/76,917.40
  6. Step 6: Final answer
    x = 59,938.42

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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.