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Finding the Fourth Proportional to 80,670.16, 120,811.44 and 45,043.93

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Solution

The fourth proportional to 80,670.16, 120,811.44 and 45,043.93 is: 67,457.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,670.16 : 120,811.44 = 45,043.93 : x
  2. Step 2: Convert to fraction form
    80,670.16/120,811.44 = 45,043.93/x
  3. Step 3: Cross multiply
    80,670.16x = 120,811.44 × 45,043.93
  4. Step 4: Simplify right side
    80,670.16x = 5,441,821,442.50
  5. Step 5: Solve for x
    x = 5,441,821,442.50/80,670.16
  6. Step 6: Final answer
    x = 67,457.68

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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.