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Finding the Fourth Proportional to 70,064.23, 105,137.88 and 65,631.20

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Solution

The fourth proportional to 70,064.23, 105,137.88 and 65,631.20 is: 98,485.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,064.23 : 105,137.88 = 65,631.20 : x
  2. Step 2: Convert to fraction form
    70,064.23/105,137.88 = 65,631.20/x
  3. Step 3: Cross multiply
    70,064.23x = 105,137.88 × 65,631.20
  4. Step 4: Simplify right side
    70,064.23x = 6,900,325,229.86
  5. Step 5: Solve for x
    x = 6,900,325,229.86/70,064.23
  6. Step 6: Final answer
    x = 98,485.71

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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.