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Finding the Fourth Proportional to 70,412.22, 96,964.11 and 65,909.75

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Solution

The fourth proportional to 70,412.22, 96,964.11 and 65,909.75 is: 90,763.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,412.22 : 96,964.11 = 65,909.75 : x
  2. Step 2: Convert to fraction form
    70,412.22/96,964.11 = 65,909.75/x
  3. Step 3: Cross multiply
    70,412.22x = 96,964.11 × 65,909.75
  4. Step 4: Simplify right side
    70,412.22x = 6,390,879,764.25
  5. Step 5: Solve for x
    x = 6,390,879,764.25/70,412.22
  6. Step 6: Final answer
    x = 90,763.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.