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Finding the Fourth Proportional to 76,889.79, 106,108.79 and 43,355.79

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Solution

The fourth proportional to 76,889.79, 106,108.79 and 43,355.79 is: 59,831.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,889.79 : 106,108.79 = 43,355.79 : x
  2. Step 2: Convert to fraction form
    76,889.79/106,108.79 = 43,355.79/x
  3. Step 3: Cross multiply
    76,889.79x = 106,108.79 × 43,355.79
  4. Step 4: Simplify right side
    76,889.79x = 4,600,430,199.62
  5. Step 5: Solve for x
    x = 4,600,430,199.62/76,889.79
  6. Step 6: Final answer
    x = 59,831.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.