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Finding the Fourth Proportional to 65,670.81, 98,515.42 and 21,283.21

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Solution

The fourth proportional to 65,670.81, 98,515.42 and 21,283.21 is: 31,927.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,670.81 : 98,515.42 = 21,283.21 : x
  2. Step 2: Convert to fraction form
    65,670.81/98,515.42 = 21,283.21/x
  3. Step 3: Cross multiply
    65,670.81x = 98,515.42 × 21,283.21
  4. Step 4: Simplify right side
    65,670.81x = 2,096,724,372.10
  5. Step 5: Solve for x
    x = 2,096,724,372.10/65,670.81
  6. Step 6: Final answer
    x = 31,927.80

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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.