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Finding the Fourth Proportional to 65,609.40, 98,438.40 and 21,237.60

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Solution

The fourth proportional to 65,609.40, 98,438.40 and 21,237.60 is: 31,864.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,609.40 : 98,438.40 = 21,237.60 : x
  2. Step 2: Convert to fraction form
    65,609.40/98,438.40 = 21,237.60/x
  3. Step 3: Cross multiply
    65,609.40x = 98,438.40 × 21,237.60
  4. Step 4: Simplify right side
    65,609.40x = 2,090,595,363.84
  5. Step 5: Solve for x
    x = 2,090,595,363.84/65,609.40
  6. Step 6: Final answer
    x = 31,864.27

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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.