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Finding the Fourth Proportional to 39,139.60, 58,747.80 and 19,440.40

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Solution

The fourth proportional to 39,139.60, 58,747.80 and 19,440.40 is: 29,179.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,139.60 : 58,747.80 = 19,440.40 : x
  2. Step 2: Convert to fraction form
    39,139.60/58,747.80 = 19,440.40/x
  3. Step 3: Cross multiply
    39,139.60x = 58,747.80 × 19,440.40
  4. Step 4: Simplify right side
    39,139.60x = 1,142,080,731.12
  5. Step 5: Solve for x
    x = 1,142,080,731.12/39,139.60
  6. Step 6: Final answer
    x = 29,179.67

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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.