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Finding the Fourth Proportional to 70,334.40, 105,485.04 and 20,401.32

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Solution

The fourth proportional to 70,334.40, 105,485.04 and 20,401.32 is: 30,597.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,334.40 : 105,485.04 = 20,401.32 : x
  2. Step 2: Convert to fraction form
    70,334.40/105,485.04 = 20,401.32/x
  3. Step 3: Cross multiply
    70,334.40x = 105,485.04 × 20,401.32
  4. Step 4: Simplify right side
    70,334.40x = 2,152,034,056.25
  5. Step 5: Solve for x
    x = 2,152,034,056.25/70,334.40
  6. Step 6: Final answer
    x = 30,597.18

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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.