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Finding the Fourth Proportional to 208,485.63, 287,702.44 and 112,990.28

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Solution

The fourth proportional to 208,485.63, 287,702.44 and 112,990.28 is: 155,922.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,485.63 : 287,702.44 = 112,990.28 : x
  2. Step 2: Convert to fraction form
    208,485.63/287,702.44 = 112,990.28/x
  3. Step 3: Cross multiply
    208,485.63x = 287,702.44 × 112,990.28
  4. Step 4: Simplify right side
    208,485.63x = 32,507,579,252.28
  5. Step 5: Solve for x
    x = 32,507,579,252.28/208,485.63
  6. Step 6: Final answer
    x = 155,922.40

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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.