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Finding the Fourth Proportional to 208,396.72, 287,587.08 and 112,906

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Solution

The fourth proportional to 208,396.72, 287,587.08 and 112,906 is: 155,810.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,396.72 : 287,587.08 = 112,906 : x
  2. Step 2: Convert to fraction form
    208,396.72/287,587.08 = 112,906/x
  3. Step 3: Cross multiply
    208,396.72x = 287,587.08 × 112,906
  4. Step 4: Simplify right side
    208,396.72x = 32,470,306,854.48
  5. Step 5: Solve for x
    x = 32,470,306,854.48/208,396.72
  6. Step 6: Final answer
    x = 155,810.07

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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.