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Finding the Fourth Proportional to 139,509.12, 209,232.12 and 39,667.12

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Solution

The fourth proportional to 139,509.12, 209,232.12 and 39,667.12 is: 59,491.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,509.12 : 209,232.12 = 39,667.12 : x
  2. Step 2: Convert to fraction form
    139,509.12/209,232.12 = 39,667.12/x
  3. Step 3: Cross multiply
    139,509.12x = 209,232.12 × 39,667.12
  4. Step 4: Simplify right side
    139,509.12x = 8,299,635,611.89
  5. Step 5: Solve for x
    x = 8,299,635,611.89/139,509.12
  6. Step 6: Final answer
    x = 59,491.71

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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.