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Finding the Fourth Proportional to 70,862.08, 106,311.48 and 20,940.16

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Solution

The fourth proportional to 70,862.08, 106,311.48 and 20,940.16 is: 31,415.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,862.08 : 106,311.48 = 20,940.16 : x
  2. Step 2: Convert to fraction form
    70,862.08/106,311.48 = 20,940.16/x
  3. Step 3: Cross multiply
    70,862.08x = 106,311.48 × 20,940.16
  4. Step 4: Simplify right side
    70,862.08x = 2,226,179,401.04
  5. Step 5: Solve for x
    x = 2,226,179,401.04/70,862.08
  6. Step 6: Final answer
    x = 31,415.67

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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.