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Finding the Fourth Proportional to 71,015.96, 106,505.50 and 21,084.32

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Solution

The fourth proportional to 71,015.96, 106,505.50 and 21,084.32 is: 31,621.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,015.96 : 106,505.50 = 21,084.32 : x
  2. Step 2: Convert to fraction form
    71,015.96/106,505.50 = 21,084.32/x
  3. Step 3: Cross multiply
    71,015.96x = 106,505.50 × 21,084.32
  4. Step 4: Simplify right side
    71,015.96x = 2,245,596,043.76
  5. Step 5: Solve for x
    x = 2,245,596,043.76/71,015.96
  6. Step 6: Final answer
    x = 31,621.01

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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.