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Finding the Fourth Proportional to 208,485.41, 287,708.69 and 112,992.08

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Solution

The fourth proportional to 208,485.41, 287,708.69 and 112,992.08 is: 155,928.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,485.41 : 287,708.69 = 112,992.08 : x
  2. Step 2: Convert to fraction form
    208,485.41/287,708.69 = 112,992.08/x
  3. Step 3: Cross multiply
    208,485.41x = 287,708.69 × 112,992.08
  4. Step 4: Simplify right side
    208,485.41x = 32,508,802,161.11
  5. Step 5: Solve for x
    x = 32,508,802,161.11/208,485.41
  6. Step 6: Final answer
    x = 155,928.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.