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Finding the Fourth Proportional to 81,507.93, 122,247.90 and 21,537.06

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Solution

The fourth proportional to 81,507.93, 122,247.90 and 21,537.06 is: 32,301.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,507.93 : 122,247.90 = 21,537.06 : x
  2. Step 2: Convert to fraction form
    81,507.93/122,247.90 = 21,537.06/x
  3. Step 3: Cross multiply
    81,507.93x = 122,247.90 × 21,537.06
  4. Step 4: Simplify right side
    81,507.93x = 2,632,860,357.17
  5. Step 5: Solve for x
    x = 2,632,860,357.17/81,507.93
  6. Step 6: Final answer
    x = 32,301.89

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1.5x scale

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.