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Finding the Fourth Proportional to 76,740.32, 115,110.48 and 72,408.80

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Solution

The fourth proportional to 76,740.32, 115,110.48 and 72,408.80 is: 108,613.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,740.32 : 115,110.48 = 72,408.80 : x
  2. Step 2: Convert to fraction form
    76,740.32/115,110.48 = 72,408.80/x
  3. Step 3: Cross multiply
    76,740.32x = 115,110.48 × 72,408.80
  4. Step 4: Simplify right side
    76,740.32x = 8,335,011,724.22
  5. Step 5: Solve for x
    x = 8,335,011,724.22/76,740.32
  6. Step 6: Final answer
    x = 108,613.20

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1.5x scale

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.