Home / 76,631.62-115,013.04-43,384.36

Finding the Fourth Proportional to 76,631.62, 115,013.04 and 43,384.36

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Solution

The fourth proportional to 76,631.62, 115,013.04 and 43,384.36 is: 65,113.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,631.62 : 115,013.04 = 43,384.36 : x
  2. Step 2: Convert to fraction form
    76,631.62/115,013.04 = 43,384.36/x
  3. Step 3: Cross multiply
    76,631.62x = 115,013.04 × 43,384.36
  4. Step 4: Simplify right side
    76,631.62x = 4,989,767,132.05
  5. Step 5: Solve for x
    x = 4,989,767,132.05/76,631.62
  6. Step 6: Final answer
    x = 65,113.68

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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.