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Finding the Fourth Proportional to 71,670.51, 98,896.71 and 39,399.81

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Solution

The fourth proportional to 71,670.51, 98,896.71 and 39,399.81 is: 54,367.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,670.51 : 98,896.71 = 39,399.81 : x
  2. Step 2: Convert to fraction form
    71,670.51/98,896.71 = 39,399.81/x
  3. Step 3: Cross multiply
    71,670.51x = 98,896.71 × 39,399.81
  4. Step 4: Simplify right side
    71,670.51x = 3,896,511,583.63
  5. Step 5: Solve for x
    x = 3,896,511,583.63/71,670.51
  6. Step 6: Final answer
    x = 54,367.01

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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.