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Finding the Fourth Proportional to 65,720.60, 98,595.30 and 21,339.80

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Solution

The fourth proportional to 65,720.60, 98,595.30 and 21,339.80 is: 32,014.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,720.60 : 98,595.30 = 21,339.80 : x
  2. Step 2: Convert to fraction form
    65,720.60/98,595.30 = 21,339.80/x
  3. Step 3: Cross multiply
    65,720.60x = 98,595.30 × 21,339.80
  4. Step 4: Simplify right side
    65,720.60x = 2,104,003,982.94
  5. Step 5: Solve for x
    x = 2,104,003,982.94/65,720.60
  6. Step 6: Final answer
    x = 32,014.38

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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.