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Finding the Fourth Proportional to 70,913.21, 106,406.87 and 45,946.80

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Solution

The fourth proportional to 70,913.21, 106,406.87 and 45,946.80 is: 68,944.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,913.21 : 106,406.87 = 45,946.80 : x
  2. Step 2: Convert to fraction form
    70,913.21/106,406.87 = 45,946.80/x
  3. Step 3: Cross multiply
    70,913.21x = 106,406.87 × 45,946.80
  4. Step 4: Simplify right side
    70,913.21x = 4,889,054,944.78
  5. Step 5: Solve for x
    x = 4,889,054,944.78/70,913.21
  6. Step 6: Final answer
    x = 68,944.21

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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.