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Finding the Fourth Proportional to 65,609.60, 98,417.44 and 21,239.80

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Solution

The fourth proportional to 65,609.60, 98,417.44 and 21,239.80 is: 31,860.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,609.60 : 98,417.44 = 21,239.80 : x
  2. Step 2: Convert to fraction form
    65,609.60/98,417.44 = 21,239.80/x
  3. Step 3: Cross multiply
    65,609.60x = 98,417.44 × 21,239.80
  4. Step 4: Simplify right side
    65,609.60x = 2,090,366,742.11
  5. Step 5: Solve for x
    x = 2,090,366,742.11/65,609.60
  6. Step 6: Final answer
    x = 31,860.68

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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.