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Finding the Fourth Proportional to 65,376.40, 98,079.12 and 18,629.68

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Solution

The fourth proportional to 65,376.40, 98,079.12 and 18,629.68 is: 27,948.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,376.40 : 98,079.12 = 18,629.68 : x
  2. Step 2: Convert to fraction form
    65,376.40/98,079.12 = 18,629.68/x
  3. Step 3: Cross multiply
    65,376.40x = 98,079.12 × 18,629.68
  4. Step 4: Simplify right side
    65,376.40x = 1,827,182,620.28
  5. Step 5: Solve for x
    x = 1,827,182,620.28/65,376.40
  6. Step 6: Final answer
    x = 27,948.66

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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.