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Finding the Fourth Proportional to 77,793.78, 107,361.54 and 71,762.52

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Solution

The fourth proportional to 77,793.78, 107,361.54 and 71,762.52 is: 99,037.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,793.78 : 107,361.54 = 71,762.52 : x
  2. Step 2: Convert to fraction form
    77,793.78/107,361.54 = 71,762.52/x
  3. Step 3: Cross multiply
    77,793.78x = 107,361.54 × 71,762.52
  4. Step 4: Simplify right side
    77,793.78x = 7,704,534,661.48
  5. Step 5: Solve for x
    x = 7,704,534,661.48/77,793.78
  6. Step 6: Final answer
    x = 99,037.93

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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.