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Finding the Fourth Proportional to 115,798.78, 159,791.02 and 64,808.47

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Solution

The fourth proportional to 115,798.78, 159,791.02 and 64,808.47 is: 89,429.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,798.78 : 159,791.02 = 64,808.47 : x
  2. Step 2: Convert to fraction form
    115,798.78/159,791.02 = 64,808.47/x
  3. Step 3: Cross multiply
    115,798.78x = 159,791.02 × 64,808.47
  4. Step 4: Simplify right side
    115,798.78x = 10,355,811,525.94
  5. Step 5: Solve for x
    x = 10,355,811,525.94/115,798.78
  6. Step 6: Final answer
    x = 89,429.37

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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.