Home / 88,868.93-121,986.31-78,571.80

Finding the Fourth Proportional to 88,868.93, 121,986.31 and 78,571.80

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Solution

The fourth proportional to 88,868.93, 121,986.31 and 78,571.80 is: 107,851.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,868.93 : 121,986.31 = 78,571.80 : x
  2. Step 2: Convert to fraction form
    88,868.93/121,986.31 = 78,571.80/x
  3. Step 3: Cross multiply
    88,868.93x = 121,986.31 × 78,571.80
  4. Step 4: Simplify right side
    88,868.93x = 9,584,683,952.06
  5. Step 5: Solve for x
    x = 9,584,683,952.06/88,868.93
  6. Step 6: Final answer
    x = 107,851.91

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.