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Finding the Fourth Proportional to 208,006.79, 312,056.96 and 65,860.56

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Solution

The fourth proportional to 208,006.79, 312,056.96 and 65,860.56 is: 98,805.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,006.79 : 312,056.96 = 65,860.56 : x
  2. Step 2: Convert to fraction form
    208,006.79/312,056.96 = 65,860.56/x
  3. Step 3: Cross multiply
    208,006.79x = 312,056.96 × 65,860.56
  4. Step 4: Simplify right side
    208,006.79x = 20,552,245,808.19
  5. Step 5: Solve for x
    x = 20,552,245,808.19/208,006.79
  6. Step 6: Final answer
    x = 98,805.65

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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.