Home / 123,890.40-170,949.60-72,928.80

Finding the Fourth Proportional to 123,890.40, 170,949.60 and 72,928.80

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Solution

The fourth proportional to 123,890.40, 170,949.60 and 72,928.80 is: 100,630.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,890.40 : 170,949.60 = 72,928.80 : x
  2. Step 2: Convert to fraction form
    123,890.40/170,949.60 = 72,928.80/x
  3. Step 3: Cross multiply
    123,890.40x = 170,949.60 × 72,928.80
  4. Step 4: Simplify right side
    123,890.40x = 12,467,149,188.48
  5. Step 5: Solve for x
    x = 12,467,149,188.48/123,890.40
  6. Step 6: Final answer
    x = 100,630.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.