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Finding the Fourth Proportional to 70,533.56, 105,811.66 and 20,607.32

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Solution

The fourth proportional to 70,533.56, 105,811.66 and 20,607.32 is: 30,914.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,533.56 : 105,811.66 = 20,607.32 : x
  2. Step 2: Convert to fraction form
    70,533.56/105,811.66 = 20,607.32/x
  3. Step 3: Cross multiply
    70,533.56x = 105,811.66 × 20,607.32
  4. Step 4: Simplify right side
    70,533.56x = 2,180,494,737.35
  5. Step 5: Solve for x
    x = 2,180,494,737.35/70,533.56
  6. Step 6: Final answer
    x = 30,914.29

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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.