Home / 71,643.56-98,867.40-39,811.80

Finding the Fourth Proportional to 71,643.56, 98,867.40 and 39,811.80

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Solution

The fourth proportional to 71,643.56, 98,867.40 and 39,811.80 is: 54,939.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,643.56 : 98,867.40 = 39,811.80 : x
  2. Step 2: Convert to fraction form
    71,643.56/98,867.40 = 39,811.80/x
  3. Step 3: Cross multiply
    71,643.56x = 98,867.40 × 39,811.80
  4. Step 4: Simplify right side
    71,643.56x = 3,936,089,155.32
  5. Step 5: Solve for x
    x = 3,936,089,155.32/71,643.56
  6. Step 6: Final answer
    x = 54,939.89

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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.