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Finding the Fourth Proportional to 65,859.20, 98,801.60 and 28,419.20

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Solution

The fourth proportional to 65,859.20, 98,801.60 and 28,419.20 is: 42,634.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,859.20 : 98,801.60 = 28,419.20 : x
  2. Step 2: Convert to fraction form
    65,859.20/98,801.60 = 28,419.20/x
  3. Step 3: Cross multiply
    65,859.20x = 98,801.60 × 28,419.20
  4. Step 4: Simplify right side
    65,859.20x = 2,807,862,430.72
  5. Step 5: Solve for x
    x = 2,807,862,430.72/65,859.20
  6. Step 6: Final answer
    x = 42,634.32

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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.