Home / 78,431.14-117,653.76-22,271.80

Finding the Fourth Proportional to 78,431.14, 117,653.76 and 22,271.80

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Solution

The fourth proportional to 78,431.14, 117,653.76 and 22,271.80 is: 33,409.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,431.14 : 117,653.76 = 22,271.80 : x
  2. Step 2: Convert to fraction form
    78,431.14/117,653.76 = 22,271.80/x
  3. Step 3: Cross multiply
    78,431.14x = 117,653.76 × 22,271.80
  4. Step 4: Simplify right side
    78,431.14x = 2,620,361,011.97
  5. Step 5: Solve for x
    x = 2,620,361,011.97/78,431.14
  6. Step 6: Final answer
    x = 33,409.70

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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.