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Finding the Fourth Proportional to 60,823.68, 91,240.40 and 21,389.64

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Solution

The fourth proportional to 60,823.68, 91,240.40 and 21,389.64 is: 32,086.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,823.68 : 91,240.40 = 21,389.64 : x
  2. Step 2: Convert to fraction form
    60,823.68/91,240.40 = 21,389.64/x
  3. Step 3: Cross multiply
    60,823.68x = 91,240.40 × 21,389.64
  4. Step 4: Simplify right side
    60,823.68x = 1,951,599,362.93
  5. Step 5: Solve for x
    x = 1,951,599,362.93/60,823.68
  6. Step 6: Final answer
    x = 32,086.18

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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.