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Finding the Fourth Proportional to 81,722.95, 112,771.60 and 45,918.92

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Solution

The fourth proportional to 81,722.95, 112,771.60 and 45,918.92 is: 63,364.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,722.95 : 112,771.60 = 45,918.92 : x
  2. Step 2: Convert to fraction form
    81,722.95/112,771.60 = 45,918.92/x
  3. Step 3: Cross multiply
    81,722.95x = 112,771.60 × 45,918.92
  4. Step 4: Simplify right side
    81,722.95x = 5,178,350,078.67
  5. Step 5: Solve for x
    x = 5,178,350,078.67/81,722.95
  6. Step 6: Final answer
    x = 63,364.70

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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.