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Finding the Fourth Proportional to 139,161.03, 208,752.81 and 39,322.05

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Solution

The fourth proportional to 139,161.03, 208,752.81 and 39,322.05 is: 58,986.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,161.03 : 208,752.81 = 39,322.05 : x
  2. Step 2: Convert to fraction form
    139,161.03/208,752.81 = 39,322.05/x
  3. Step 3: Cross multiply
    139,161.03x = 208,752.81 × 39,322.05
  4. Step 4: Simplify right side
    139,161.03x = 8,208,588,432.46
  5. Step 5: Solve for x
    x = 8,208,588,432.46/139,161.03
  6. Step 6: Final answer
    x = 58,986.26

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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.