Home / 318,617.46-477,935.78-78,731.35

Finding the Fourth Proportional to 318,617.46, 477,935.78 and 78,731.35

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Solution

The fourth proportional to 318,617.46, 477,935.78 and 78,731.35 is: 118,099.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,617.46 : 477,935.78 = 78,731.35 : x
  2. Step 2: Convert to fraction form
    318,617.46/477,935.78 = 78,731.35/x
  3. Step 3: Cross multiply
    318,617.46x = 477,935.78 × 78,731.35
  4. Step 4: Simplify right side
    318,617.46x = 37,628,529,172.70
  5. Step 5: Solve for x
    x = 37,628,529,172.70/318,617.46
  6. Step 6: Final answer
    x = 118,099.39

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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.