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Finding the Fourth Proportional to 208,013.62, 287,058.67 and 112,520.31

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Solution

The fourth proportional to 208,013.62, 287,058.67 and 112,520.31 is: 155,277.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,013.62 : 287,058.67 = 112,520.31 : x
  2. Step 2: Convert to fraction form
    208,013.62/287,058.67 = 112,520.31/x
  3. Step 3: Cross multiply
    208,013.62x = 287,058.67 × 112,520.31
  4. Step 4: Simplify right side
    208,013.62x = 32,299,932,075.57
  5. Step 5: Solve for x
    x = 32,299,932,075.57/208,013.62
  6. Step 6: Final answer
    x = 155,277.97

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1.5x scale

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.