Home / 68,439.57-102,659.61-21,054.35

Finding the Fourth Proportional to 68,439.57, 102,659.61 and 21,054.35

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Solution

The fourth proportional to 68,439.57, 102,659.61 and 21,054.35 is: 31,581.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,439.57 : 102,659.61 = 21,054.35 : x
  2. Step 2: Convert to fraction form
    68,439.57/102,659.61 = 21,054.35/x
  3. Step 3: Cross multiply
    68,439.57x = 102,659.61 × 21,054.35
  4. Step 4: Simplify right side
    68,439.57x = 2,161,430,846.51
  5. Step 5: Solve for x
    x = 2,161,430,846.51/68,439.57
  6. Step 6: Final answer
    x = 31,581.60

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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.