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Finding the Fourth Proportional to 70,311.50, 105,467.26 and 21,063.50

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Solution

The fourth proportional to 70,311.50, 105,467.26 and 21,063.50 is: 31,595.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,311.50 : 105,467.26 = 21,063.50 : x
  2. Step 2: Convert to fraction form
    70,311.50/105,467.26 = 21,063.50/x
  3. Step 3: Cross multiply
    70,311.50x = 105,467.26 × 21,063.50
  4. Step 4: Simplify right side
    70,311.50x = 2,221,509,631.01
  5. Step 5: Solve for x
    x = 2,221,509,631.01/70,311.50
  6. Step 6: Final answer
    x = 31,595.25

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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.