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Finding the Fourth Proportional to 70,931.44, 106,412.74 and 21,015.44

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Solution

The fourth proportional to 70,931.44, 106,412.74 and 21,015.44 is: 31,527.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,931.44 : 106,412.74 = 21,015.44 : x
  2. Step 2: Convert to fraction form
    70,931.44/106,412.74 = 21,015.44/x
  3. Step 3: Cross multiply
    70,931.44x = 106,412.74 × 21,015.44
  4. Step 4: Simplify right side
    70,931.44x = 2,236,310,552.71
  5. Step 5: Solve for x
    x = 2,236,310,552.71/70,931.44
  6. Step 6: Final answer
    x = 31,527.78

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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.