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Finding the Fourth Proportional to 115,603.52, 159,485.64 and 91,634

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Solution

The fourth proportional to 115,603.52, 159,485.64 and 91,634 is: 126,417.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,603.52 : 159,485.64 = 91,634 : x
  2. Step 2: Convert to fraction form
    115,603.52/159,485.64 = 91,634/x
  3. Step 3: Cross multiply
    115,603.52x = 159,485.64 × 91,634
  4. Step 4: Simplify right side
    115,603.52x = 14,614,307,135.76
  5. Step 5: Solve for x
    x = 14,614,307,135.76/115,603.52
  6. Step 6: Final answer
    x = 126,417.49

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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.