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Finding the Fourth Proportional to 139,343.36, 208,970.88 and 45,827.36

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Solution

The fourth proportional to 139,343.36, 208,970.88 and 45,827.36 is: 68,726.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,343.36 : 208,970.88 = 45,827.36 : x
  2. Step 2: Convert to fraction form
    139,343.36/208,970.88 = 45,827.36/x
  3. Step 3: Cross multiply
    139,343.36x = 208,970.88 × 45,827.36
  4. Step 4: Simplify right side
    139,343.36x = 9,576,583,747.28
  5. Step 5: Solve for x
    x = 9,576,583,747.28/139,343.36
  6. Step 6: Final answer
    x = 68,726.52

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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.