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Finding the Fourth Proportional to 99,712.50, 137,603.25 and 55,000.50

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Solution

The fourth proportional to 99,712.50, 137,603.25 and 55,000.50 is: 75,900.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,712.50 : 137,603.25 = 55,000.50 : x
  2. Step 2: Convert to fraction form
    99,712.50/137,603.25 = 55,000.50/x
  3. Step 3: Cross multiply
    99,712.50x = 137,603.25 × 55,000.50
  4. Step 4: Simplify right side
    99,712.50x = 7,568,247,551.63
  5. Step 5: Solve for x
    x = 7,568,247,551.63/99,712.50
  6. Step 6: Final answer
    x = 75,900.69

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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.