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Finding the Fourth Proportional to 208,458.77, 312,684.81 and 66,301.98

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Solution

The fourth proportional to 208,458.77, 312,684.81 and 66,301.98 is: 99,451.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,458.77 : 312,684.81 = 66,301.98 : x
  2. Step 2: Convert to fraction form
    208,458.77/312,684.81 = 66,301.98/x
  3. Step 3: Cross multiply
    208,458.77x = 312,684.81 × 66,301.98
  4. Step 4: Simplify right side
    208,458.77x = 20,731,622,018.92
  5. Step 5: Solve for x
    x = 20,731,622,018.92/208,458.77
  6. Step 6: Final answer
    x = 99,451.91

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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.