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Finding the Fourth Proportional to 70,409.08, 105,477.53 and 39,149.56

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Solution

The fourth proportional to 70,409.08, 105,477.53 and 39,149.56 is: 58,648.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,409.08 : 105,477.53 = 39,149.56 : x
  2. Step 2: Convert to fraction form
    70,409.08/105,477.53 = 39,149.56/x
  3. Step 3: Cross multiply
    70,409.08x = 105,477.53 × 39,149.56
  4. Step 4: Simplify right side
    70,409.08x = 4,129,398,825.49
  5. Step 5: Solve for x
    x = 4,129,398,825.49/70,409.08
  6. Step 6: Final answer
    x = 58,648.67

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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.