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Finding the Fourth Proportional to 208,281.10, 287,427.85 and 112,787.77

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Solution

The fourth proportional to 208,281.10, 287,427.85 and 112,787.77 is: 155,647.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,281.10 : 287,427.85 = 112,787.77 : x
  2. Step 2: Convert to fraction form
    208,281.10/287,427.85 = 112,787.77/x
  3. Step 3: Cross multiply
    208,281.10x = 287,427.85 × 112,787.77
  4. Step 4: Simplify right side
    208,281.10x = 32,418,346,237.39
  5. Step 5: Solve for x
    x = 32,418,346,237.39/208,281.10
  6. Step 6: Final answer
    x = 155,647.09

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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.