Home / 71,712.36-98,963.64-39,880.58

Finding the Fourth Proportional to 71,712.36, 98,963.64 and 39,880.58

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Solution

The fourth proportional to 71,712.36, 98,963.64 and 39,880.58 is: 55,035.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,712.36 : 98,963.64 = 39,880.58 : x
  2. Step 2: Convert to fraction form
    71,712.36/98,963.64 = 39,880.58/x
  3. Step 3: Cross multiply
    71,712.36x = 98,963.64 × 39,880.58
  4. Step 4: Simplify right side
    71,712.36x = 3,946,726,867.29
  5. Step 5: Solve for x
    x = 3,946,726,867.29/71,712.36
  6. Step 6: Final answer
    x = 55,035.52

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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.