Home / 68,629.20-102,943.80-65,421.60

Finding the Fourth Proportional to 68,629.20, 102,943.80 and 65,421.60

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Solution

The fourth proportional to 68,629.20, 102,943.80 and 65,421.60 is: 98,132.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,629.20 : 102,943.80 = 65,421.60 : x
  2. Step 2: Convert to fraction form
    68,629.20/102,943.80 = 65,421.60/x
  3. Step 3: Cross multiply
    68,629.20x = 102,943.80 × 65,421.60
  4. Step 4: Simplify right side
    68,629.20x = 6,734,748,106.08
  5. Step 5: Solve for x
    x = 6,734,748,106.08/68,629.20
  6. Step 6: Final answer
    x = 98,132.40

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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.