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Finding the Fourth Proportional to 81,422.70, 112,362 and 45,612.48

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Solution

The fourth proportional to 81,422.70, 112,362 and 45,612.48 is: 62,944.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,422.70 : 112,362 = 45,612.48 : x
  2. Step 2: Convert to fraction form
    81,422.70/112,362 = 45,612.48/x
  3. Step 3: Cross multiply
    81,422.70x = 112,362 × 45,612.48
  4. Step 4: Simplify right side
    81,422.70x = 5,125,109,477.76
  5. Step 5: Solve for x
    x = 5,125,109,477.76/81,422.70
  6. Step 6: Final answer
    x = 62,944.48

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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.