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Finding the Fourth Proportional to 65,978.40, 99,025.20 and 52,797.60

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Solution

The fourth proportional to 65,978.40, 99,025.20 and 52,797.60 is: 79,242.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,978.40 : 99,025.20 = 52,797.60 : x
  2. Step 2: Convert to fraction form
    65,978.40/99,025.20 = 52,797.60/x
  3. Step 3: Cross multiply
    65,978.40x = 99,025.20 × 52,797.60
  4. Step 4: Simplify right side
    65,978.40x = 5,228,292,899.52
  5. Step 5: Solve for x
    x = 5,228,292,899.52/65,978.40
  6. Step 6: Final answer
    x = 79,242.49

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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.