Home / 72,815.71-100,485.66-40,984.78

Finding the Fourth Proportional to 72,815.71, 100,485.66 and 40,984.78

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Solution

The fourth proportional to 72,815.71, 100,485.66 and 40,984.78 is: 56,558.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,815.71 : 100,485.66 = 40,984.78 : x
  2. Step 2: Convert to fraction form
    72,815.71/100,485.66 = 40,984.78/x
  3. Step 3: Cross multiply
    72,815.71x = 100,485.66 × 40,984.78
  4. Step 4: Simplify right side
    72,815.71x = 4,118,382,668.25
  5. Step 5: Solve for x
    x = 4,118,382,668.25/72,815.71
  6. Step 6: Final answer
    x = 56,558.99

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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.