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Finding the Fourth Proportional to 77,071.75, 115,607.63 and 21,667.75

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Solution

The fourth proportional to 77,071.75, 115,607.63 and 21,667.75 is: 32,501.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,071.75 : 115,607.63 = 21,667.75 : x
  2. Step 2: Convert to fraction form
    77,071.75/115,607.63 = 21,667.75/x
  3. Step 3: Cross multiply
    77,071.75x = 115,607.63 × 21,667.75
  4. Step 4: Simplify right side
    77,071.75x = 2,504,957,224.93
  5. Step 5: Solve for x
    x = 2,504,957,224.93/77,071.75
  6. Step 6: Final answer
    x = 32,501.63

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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.