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Finding the Fourth Proportional to 91,836, 137,777.12 and 26,172

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Solution

The fourth proportional to 91,836, 137,777.12 and 26,172 is: 39,264.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,836 : 137,777.12 = 26,172 : x
  2. Step 2: Convert to fraction form
    91,836/137,777.12 = 26,172/x
  3. Step 3: Cross multiply
    91,836x = 137,777.12 × 26,172
  4. Step 4: Simplify right side
    91,836x = 3,605,902,784.64
  5. Step 5: Solve for x
    x = 3,605,902,784.64/91,836
  6. Step 6: Final answer
    x = 39,264.59

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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.