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Finding the Fourth Proportional to 76,696.40, 115,087.80 and 29,943.20

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Solution

The fourth proportional to 76,696.40, 115,087.80 and 29,943.20 is: 44,931.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,696.40 : 115,087.80 = 29,943.20 : x
  2. Step 2: Convert to fraction form
    76,696.40/115,087.80 = 29,943.20/x
  3. Step 3: Cross multiply
    76,696.40x = 115,087.80 × 29,943.20
  4. Step 4: Simplify right side
    76,696.40x = 3,446,097,012.96
  5. Step 5: Solve for x
    x = 3,446,097,012.96/76,696.40
  6. Step 6: Final answer
    x = 44,931.67

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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.