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Finding the Fourth Proportional to 81,809.48, 112,953 and 62,655.41

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Solution

The fourth proportional to 81,809.48, 112,953 and 62,655.41 is: 86,507.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,809.48 : 112,953 = 62,655.41 : x
  2. Step 2: Convert to fraction form
    81,809.48/112,953 = 62,655.41/x
  3. Step 3: Cross multiply
    81,809.48x = 112,953 × 62,655.41
  4. Step 4: Simplify right side
    81,809.48x = 7,077,115,960.97
  5. Step 5: Solve for x
    x = 7,077,115,960.97/81,809.48
  6. Step 6: Final answer
    x = 86,507.29

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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.