Home / 77,139.40-115,709.10-76,102.60

Finding the Fourth Proportional to 77,139.40, 115,709.10 and 76,102.60

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Solution

The fourth proportional to 77,139.40, 115,709.10 and 76,102.60 is: 114,153.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,139.40 : 115,709.10 = 76,102.60 : x
  2. Step 2: Convert to fraction form
    77,139.40/115,709.10 = 76,102.60/x
  3. Step 3: Cross multiply
    77,139.40x = 115,709.10 × 76,102.60
  4. Step 4: Simplify right side
    77,139.40x = 8,805,763,353.66
  5. Step 5: Solve for x
    x = 8,805,763,353.66/77,139.40
  6. Step 6: Final answer
    x = 114,153.90

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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.