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Finding the Fourth Proportional to 91,223.24, 136,830.80 and 28,040.80

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Solution

The fourth proportional to 91,223.24, 136,830.80 and 28,040.80 is: 42,059.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,223.24 : 136,830.80 = 28,040.80 : x
  2. Step 2: Convert to fraction form
    91,223.24/136,830.80 = 28,040.80/x
  3. Step 3: Cross multiply
    91,223.24x = 136,830.80 × 28,040.80
  4. Step 4: Simplify right side
    91,223.24x = 3,836,845,096.64
  5. Step 5: Solve for x
    x = 3,836,845,096.64/91,223.24
  6. Step 6: Final answer
    x = 42,059.95

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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.