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Finding the Fourth Proportional to 139,310.82, 208,966.23 and 56,146.50

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Solution

The fourth proportional to 139,310.82, 208,966.23 and 56,146.50 is: 84,219.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,310.82 : 208,966.23 = 56,146.50 : x
  2. Step 2: Convert to fraction form
    139,310.82/208,966.23 = 56,146.50/x
  3. Step 3: Cross multiply
    139,310.82x = 208,966.23 × 56,146.50
  4. Step 4: Simplify right side
    139,310.82x = 11,732,722,432.70
  5. Step 5: Solve for x
    x = 11,732,722,432.70/139,310.82
  6. Step 6: Final answer
    x = 84,219.75

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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.