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Finding the Fourth Proportional to 99,363, 137,121.30 and 54,040.98

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Solution

The fourth proportional to 99,363, 137,121.30 and 54,040.98 is: 74,576.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,363 : 137,121.30 = 54,040.98 : x
  2. Step 2: Convert to fraction form
    99,363/137,121.30 = 54,040.98/x
  3. Step 3: Cross multiply
    99,363x = 137,121.30 × 54,040.98
  4. Step 4: Simplify right side
    99,363x = 7,410,169,430.87
  5. Step 5: Solve for x
    x = 7,410,169,430.87/99,363
  6. Step 6: Final answer
    x = 74,576.75

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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.