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Finding the Fourth Proportional to 208,323.54, 287,486.37 and 112,830.21

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Solution

The fourth proportional to 208,323.54, 287,486.37 and 112,830.21 is: 155,705.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,323.54 : 287,486.37 = 112,830.21 : x
  2. Step 2: Convert to fraction form
    208,323.54/287,486.37 = 112,830.21/x
  3. Step 3: Cross multiply
    208,323.54x = 287,486.37 × 112,830.21
  4. Step 4: Simplify right side
    208,323.54x = 32,437,147,499.24
  5. Step 5: Solve for x
    x = 32,437,147,499.24/208,323.54
  6. Step 6: Final answer
    x = 155,705.63

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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.