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Finding the Fourth Proportional to 208,397.91, 287,589.41 and 112,904.60

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Solution

The fourth proportional to 208,397.91, 287,589.41 and 112,904.60 is: 155,808.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,397.91 : 287,589.41 = 112,904.60 : x
  2. Step 2: Convert to fraction form
    208,397.91/287,589.41 = 112,904.60/x
  3. Step 3: Cross multiply
    208,397.91x = 287,589.41 × 112,904.60
  4. Step 4: Simplify right side
    208,397.91x = 32,470,167,656.44
  5. Step 5: Solve for x
    x = 32,470,167,656.44/208,397.91
  6. Step 6: Final answer
    x = 155,808.51

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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.