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Finding the Fourth Proportional to 81,755.78, 112,821.93 and 45,951.80

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Solution

The fourth proportional to 81,755.78, 112,821.93 and 45,951.80 is: 63,412.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,755.78 : 112,821.93 = 45,951.80 : x
  2. Step 2: Convert to fraction form
    81,755.78/112,821.93 = 45,951.80/x
  3. Step 3: Cross multiply
    81,755.78x = 112,821.93 × 45,951.80
  4. Step 4: Simplify right side
    81,755.78x = 5,184,370,762.97
  5. Step 5: Solve for x
    x = 5,184,370,762.97/81,755.78
  6. Step 6: Final answer
    x = 63,412.90

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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.