Home / 78,260.88-117,056.31-72,588.36

Finding the Fourth Proportional to 78,260.88, 117,056.31 and 72,588.36

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Solution

The fourth proportional to 78,260.88, 117,056.31 and 72,588.36 is: 108,571.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,260.88 : 117,056.31 = 72,588.36 : x
  2. Step 2: Convert to fraction form
    78,260.88/117,056.31 = 72,588.36/x
  3. Step 3: Cross multiply
    78,260.88x = 117,056.31 × 72,588.36
  4. Step 4: Simplify right side
    78,260.88x = 8,496,925,570.55
  5. Step 5: Solve for x
    x = 8,496,925,570.55/78,260.88
  6. Step 6: Final answer
    x = 108,571.81

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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.