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Finding the Fourth Proportional to 208,460.77, 312,687.81 and 66,303.98

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Solution

The fourth proportional to 208,460.77, 312,687.81 and 66,303.98 is: 99,454.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,460.77 : 312,687.81 = 66,303.98 : x
  2. Step 2: Convert to fraction form
    208,460.77/312,687.81 = 66,303.98/x
  3. Step 3: Cross multiply
    208,460.77x = 312,687.81 × 66,303.98
  4. Step 4: Simplify right side
    208,460.77x = 20,732,446,300.48
  5. Step 5: Solve for x
    x = 20,732,446,300.48/208,460.77
  6. Step 6: Final answer
    x = 99,454.91

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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.