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Finding the Fourth Proportional to 81,643.37, 112,648.13 and 47,632.44

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Solution

The fourth proportional to 81,643.37, 112,648.13 and 47,632.44 is: 65,721.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,643.37 : 112,648.13 = 47,632.44 : x
  2. Step 2: Convert to fraction form
    81,643.37/112,648.13 = 47,632.44/x
  3. Step 3: Cross multiply
    81,643.37x = 112,648.13 × 47,632.44
  4. Step 4: Simplify right side
    81,643.37x = 5,365,705,293.34
  5. Step 5: Solve for x
    x = 5,365,705,293.34/81,643.37
  6. Step 6: Final answer
    x = 65,721.26

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1.5x scale

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.