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Finding the Fourth Proportional to 208,480.14, 287,702.55 and 112,986.83

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Solution

The fourth proportional to 208,480.14, 287,702.55 and 112,986.83 is: 155,921.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,480.14 : 287,702.55 = 112,986.83 : x
  2. Step 2: Convert to fraction form
    208,480.14/287,702.55 = 112,986.83/x
  3. Step 3: Cross multiply
    208,480.14x = 287,702.55 × 112,986.83
  4. Step 4: Simplify right side
    208,480.14x = 32,506,597,668.90
  5. Step 5: Solve for x
    x = 32,506,597,668.90/208,480.14
  6. Step 6: Final answer
    x = 155,921.80

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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.