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Finding the Fourth Proportional to 99,603.69, 137,453.09 and 54,891.69

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Solution

The fourth proportional to 99,603.69, 137,453.09 and 54,891.69 is: 75,750.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,603.69 : 137,453.09 = 54,891.69 : x
  2. Step 2: Convert to fraction form
    99,603.69/137,453.09 = 54,891.69/x
  3. Step 3: Cross multiply
    99,603.69x = 137,453.09 × 54,891.69
  4. Step 4: Simplify right side
    99,603.69x = 7,545,032,405.82
  5. Step 5: Solve for x
    x = 7,545,032,405.82/99,603.69
  6. Step 6: Final answer
    x = 75,750.53

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1.5x scale

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.