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Finding the Fourth Proportional to 81,580.80, 112,696.20 and 62,957.28

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Solution

The fourth proportional to 81,580.80, 112,696.20 and 62,957.28 is: 86,969.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,580.80 : 112,696.20 = 62,957.28 : x
  2. Step 2: Convert to fraction form
    81,580.80/112,696.20 = 62,957.28/x
  3. Step 3: Cross multiply
    81,580.80x = 112,696.20 × 62,957.28
  4. Step 4: Simplify right side
    81,580.80x = 7,095,046,218.34
  5. Step 5: Solve for x
    x = 7,095,046,218.34/81,580.80
  6. Step 6: Final answer
    x = 86,969.56

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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.