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Finding the Fourth Proportional to 65,685.96, 98,519.64 and 21,313.08

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Solution

The fourth proportional to 65,685.96, 98,519.64 and 21,313.08 is: 31,966.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,685.96 : 98,519.64 = 21,313.08 : x
  2. Step 2: Convert to fraction form
    65,685.96/98,519.64 = 21,313.08/x
  3. Step 3: Cross multiply
    65,685.96x = 98,519.64 × 21,313.08
  4. Step 4: Simplify right side
    65,685.96x = 2,099,756,968.89
  5. Step 5: Solve for x
    x = 2,099,756,968.89/65,685.96
  6. Step 6: Final answer
    x = 31,966.60

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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.