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Finding the Fourth Proportional to 80,768.70, 121,153.68 and 30,835.44

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Solution

The fourth proportional to 80,768.70, 121,153.68 and 30,835.44 is: 46,253.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,768.70 : 121,153.68 = 30,835.44 : x
  2. Step 2: Convert to fraction form
    80,768.70/121,153.68 = 30,835.44/x
  3. Step 3: Cross multiply
    80,768.70x = 121,153.68 × 30,835.44
  4. Step 4: Simplify right side
    80,768.70x = 3,735,827,030.42
  5. Step 5: Solve for x
    x = 3,735,827,030.42/80,768.70
  6. Step 6: Final answer
    x = 46,253.40

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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.