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Finding the Fourth Proportional to 39,135.60, 58,741.80 and 19,436.40

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Solution

The fourth proportional to 39,135.60, 58,741.80 and 19,436.40 is: 29,173.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,135.60 : 58,741.80 = 19,436.40 : x
  2. Step 2: Convert to fraction form
    39,135.60/58,741.80 = 19,436.40/x
  3. Step 3: Cross multiply
    39,135.60x = 58,741.80 × 19,436.40
  4. Step 4: Simplify right side
    39,135.60x = 1,141,729,121.52
  5. Step 5: Solve for x
    x = 1,141,729,121.52/39,135.60
  6. Step 6: Final answer
    x = 29,173.67

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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.