Home / 74,340.40-111,640.20-72,007.60

Finding the Fourth Proportional to 74,340.40, 111,640.20 and 72,007.60

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Solution

The fourth proportional to 74,340.40, 111,640.20 and 72,007.60 is: 108,136.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,340.40 : 111,640.20 = 72,007.60 : x
  2. Step 2: Convert to fraction form
    74,340.40/111,640.20 = 72,007.60/x
  3. Step 3: Cross multiply
    74,340.40x = 111,640.20 × 72,007.60
  4. Step 4: Simplify right side
    74,340.40x = 8,038,942,865.52
  5. Step 5: Solve for x
    x = 8,038,942,865.52/74,340.40
  6. Step 6: Final answer
    x = 108,136.93

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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.