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Finding the Fourth Proportional to 70,347.40, 105,504.54 and 20,414.32

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Solution

The fourth proportional to 70,347.40, 105,504.54 and 20,414.32 is: 30,616.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,347.40 : 105,504.54 = 20,414.32 : x
  2. Step 2: Convert to fraction form
    70,347.40/105,504.54 = 20,414.32/x
  3. Step 3: Cross multiply
    70,347.40x = 105,504.54 × 20,414.32
  4. Step 4: Simplify right side
    70,347.40x = 2,153,803,441.01
  5. Step 5: Solve for x
    x = 2,153,803,441.01/70,347.40
  6. Step 6: Final answer
    x = 30,616.67

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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.