Home / 139,731,335.46-209,328,371.22-78,133,668.54

Finding the Fourth Proportional to 139,731,335.46, 209,328,371.22 and 78,133,668.54

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Solution

The fourth proportional to 139,731,335.46, 209,328,371.22 and 78,133,668.54 is: 117,050,291.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,731,335.46 : 209,328,371.22 = 78,133,668.54 : x
  2. Step 2: Convert to fraction form
    139,731,335.46/209,328,371.22 = 78,133,668.54/x
  3. Step 3: Cross multiply
    139,731,335.46x = 209,328,371.22 × 78,133,668.54
  4. Step 4: Simplify right side
    139,731,335.46x = 16,355,593,572,921,556
  5. Step 5: Solve for x
    x = 16,355,593,572,921,556/139,731,335.46
  6. Step 6: Final answer
    x = 117,050,291.68

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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.