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Finding the Fourth Proportional to 139,189.50, 208,818.93 and 40,693.50

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Solution

The fourth proportional to 139,189.50, 208,818.93 and 40,693.50 is: 61,050.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,189.50 : 208,818.93 = 40,693.50 : x
  2. Step 2: Convert to fraction form
    139,189.50/208,818.93 = 40,693.50/x
  3. Step 3: Cross multiply
    139,189.50x = 208,818.93 × 40,693.50
  4. Step 4: Simplify right side
    139,189.50x = 8,497,573,127.96
  5. Step 5: Solve for x
    x = 8,497,573,127.96/139,189.50
  6. Step 6: Final answer
    x = 61,050.39

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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.