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Finding the Fourth Proportional to 91,281.80, 125,956.42 and 50,990.58

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Solution

The fourth proportional to 91,281.80, 125,956.42 and 50,990.58 is: 70,360.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,281.80 : 125,956.42 = 50,990.58 : x
  2. Step 2: Convert to fraction form
    91,281.80/125,956.42 = 50,990.58/x
  3. Step 3: Cross multiply
    91,281.80x = 125,956.42 × 50,990.58
  4. Step 4: Simplify right side
    91,281.80x = 6,422,590,783.05
  5. Step 5: Solve for x
    x = 6,422,590,783.05/91,281.80
  6. Step 6: Final answer
    x = 70,360.03

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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.