Home / 81,153.36-121,747.32-34,405.20

Finding the Fourth Proportional to 81,153.36, 121,747.32 and 34,405.20

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Solution

The fourth proportional to 81,153.36, 121,747.32 and 34,405.20 is: 51,615.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,153.36 : 121,747.32 = 34,405.20 : x
  2. Step 2: Convert to fraction form
    81,153.36/121,747.32 = 34,405.20/x
  3. Step 3: Cross multiply
    81,153.36x = 121,747.32 × 34,405.20
  4. Step 4: Simplify right side
    81,153.36x = 4,188,740,894.06
  5. Step 5: Solve for x
    x = 4,188,740,894.06/81,153.36
  6. Step 6: Final answer
    x = 51,615.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.