Home / 139,747.68-209,589.12-39,905.28

Finding the Fourth Proportional to 139,747.68, 209,589.12 and 39,905.28

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Solution

The fourth proportional to 139,747.68, 209,589.12 and 39,905.28 is: 59,848.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,747.68 : 209,589.12 = 39,905.28 : x
  2. Step 2: Convert to fraction form
    139,747.68/209,589.12 = 39,905.28/x
  3. Step 3: Cross multiply
    139,747.68x = 209,589.12 × 39,905.28
  4. Step 4: Simplify right side
    139,747.68x = 8,363,712,518.55
  5. Step 5: Solve for x
    x = 8,363,712,518.55/139,747.68
  6. Step 6: Final answer
    x = 59,848.67

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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.