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Finding the Fourth Proportional to 70,515.51, 105,783.18 and 20,599.26

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Solution

The fourth proportional to 70,515.51, 105,783.18 and 20,599.26 is: 30,901.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,515.51 : 105,783.18 = 20,599.26 : x
  2. Step 2: Convert to fraction form
    70,515.51/105,783.18 = 20,599.26/x
  3. Step 3: Cross multiply
    70,515.51x = 105,783.18 × 20,599.26
  4. Step 4: Simplify right side
    70,515.51x = 2,179,055,228.45
  5. Step 5: Solve for x
    x = 2,179,055,228.45/70,515.51
  6. Step 6: Final answer
    x = 30,901.79

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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.