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Finding the Fourth Proportional to 64,986.80, 97,408.20 and 25,530.80

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Solution

The fourth proportional to 64,986.80, 97,408.20 and 25,530.80 is: 38,267.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,986.80 : 97,408.20 = 25,530.80 : x
  2. Step 2: Convert to fraction form
    64,986.80/97,408.20 = 25,530.80/x
  3. Step 3: Cross multiply
    64,986.80x = 97,408.20 × 25,530.80
  4. Step 4: Simplify right side
    64,986.80x = 2,486,909,272.56
  5. Step 5: Solve for x
    x = 2,486,909,272.56/64,986.80
  6. Step 6: Final answer
    x = 38,267.91

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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.