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Finding the Fourth Proportional to 91,100.81, 136,651.23 and 48,922.87

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Solution

The fourth proportional to 91,100.81, 136,651.23 and 48,922.87 is: 73,384.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,100.81 : 136,651.23 = 48,922.87 : x
  2. Step 2: Convert to fraction form
    91,100.81/136,651.23 = 48,922.87/x
  3. Step 3: Cross multiply
    91,100.81x = 136,651.23 × 48,922.87
  4. Step 4: Simplify right side
    91,100.81x = 6,685,370,019.00
  5. Step 5: Solve for x
    x = 6,685,370,019.00/91,100.81
  6. Step 6: Final answer
    x = 73,384.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.