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Finding the Fourth Proportional to 80,635.46, 120,973.64 and 56,989.53

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Solution

The fourth proportional to 80,635.46, 120,973.64 and 56,989.53 is: 85,498.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,635.46 : 120,973.64 = 56,989.53 : x
  2. Step 2: Convert to fraction form
    80,635.46/120,973.64 = 56,989.53/x
  3. Step 3: Cross multiply
    80,635.46x = 120,973.64 × 56,989.53
  4. Step 4: Simplify right side
    80,635.46x = 6,894,230,601.04
  5. Step 5: Solve for x
    x = 6,894,230,601.04/80,635.46
  6. Step 6: Final answer
    x = 85,498.75

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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.