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Finding the Fourth Proportional to 139,284.51, 208,900.04 and 39,420.56

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Solution

The fourth proportional to 139,284.51, 208,900.04 and 39,420.56 is: 59,123.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,284.51 : 208,900.04 = 39,420.56 : x
  2. Step 2: Convert to fraction form
    139,284.51/208,900.04 = 39,420.56/x
  3. Step 3: Cross multiply
    139,284.51x = 208,900.04 × 39,420.56
  4. Step 4: Simplify right side
    139,284.51x = 8,234,955,319.22
  5. Step 5: Solve for x
    x = 8,234,955,319.22/139,284.51
  6. Step 6: Final answer
    x = 59,123.27

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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.