Home / 99,812.12-137,740.75-55,100.12

Finding the Fourth Proportional to 99,812.12, 137,740.75 and 55,100.12

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Solution

The fourth proportional to 99,812.12, 137,740.75 and 55,100.12 is: 76,038.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,812.12 : 137,740.75 = 55,100.12 : x
  2. Step 2: Convert to fraction form
    99,812.12/137,740.75 = 55,100.12/x
  3. Step 3: Cross multiply
    99,812.12x = 137,740.75 × 55,100.12
  4. Step 4: Simplify right side
    99,812.12x = 7,589,531,027.44
  5. Step 5: Solve for x
    x = 7,589,531,027.44/99,812.12
  6. Step 6: Final answer
    x = 76,038.17

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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.