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Finding the Fourth Proportional to 70,322.36, 105,493.71 and 20,402.67

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Solution

The fourth proportional to 70,322.36, 105,493.71 and 20,402.67 is: 30,606.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,322.36 : 105,493.71 = 20,402.67 : x
  2. Step 2: Convert to fraction form
    70,322.36/105,493.71 = 20,402.67/x
  3. Step 3: Cross multiply
    70,322.36x = 105,493.71 × 20,402.67
  4. Step 4: Simplify right side
    70,322.36x = 2,152,353,352.21
  5. Step 5: Solve for x
    x = 2,152,353,352.21/70,322.36
  6. Step 6: Final answer
    x = 30,606.96

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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.