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Finding the Fourth Proportional to 139,069.74, 208,612.95 and 39,238.47

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Solution

The fourth proportional to 139,069.74, 208,612.95 and 39,238.47 is: 58,860.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,069.74 : 208,612.95 = 39,238.47 : x
  2. Step 2: Convert to fraction form
    139,069.74/208,612.95 = 39,238.47/x
  3. Step 3: Cross multiply
    139,069.74x = 208,612.95 × 39,238.47
  4. Step 4: Simplify right side
    139,069.74x = 8,185,652,980.19
  5. Step 5: Solve for x
    x = 8,185,652,980.19/139,069.74
  6. Step 6: Final answer
    x = 58,860.06

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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.