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Finding the Fourth Proportional to 76,807.44, 115,063.54 and 43,428.35

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Solution

The fourth proportional to 76,807.44, 115,063.54 and 43,428.35 is: 65,059.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,807.44 : 115,063.54 = 43,428.35 : x
  2. Step 2: Convert to fraction form
    76,807.44/115,063.54 = 43,428.35/x
  3. Step 3: Cross multiply
    76,807.44x = 115,063.54 × 43,428.35
  4. Step 4: Simplify right side
    76,807.44x = 4,997,019,866.45
  5. Step 5: Solve for x
    x = 4,997,019,866.45/76,807.44
  6. Step 6: Final answer
    x = 65,059.06

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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.