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Finding the Fourth Proportional to 65,718.78, 98,552.58 and 21,334.80

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Solution

The fourth proportional to 65,718.78, 98,552.58 and 21,334.80 is: 31,993.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,718.78 : 98,552.58 = 21,334.80 : x
  2. Step 2: Convert to fraction form
    65,718.78/98,552.58 = 21,334.80/x
  3. Step 3: Cross multiply
    65,718.78x = 98,552.58 × 21,334.80
  4. Step 4: Simplify right side
    65,718.78x = 2,102,599,583.78
  5. Step 5: Solve for x
    x = 2,102,599,583.78/65,718.78
  6. Step 6: Final answer
    x = 31,993.89

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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.