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Finding the Fourth Proportional to 208,115.50, 287,199.40 and 112,622.20

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Solution

The fourth proportional to 208,115.50, 287,199.40 and 112,622.20 is: 155,418.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,115.50 : 287,199.40 = 112,622.20 : x
  2. Step 2: Convert to fraction form
    208,115.50/287,199.40 = 112,622.20/x
  3. Step 3: Cross multiply
    208,115.50x = 287,199.40 × 112,622.20
  4. Step 4: Simplify right side
    208,115.50x = 32,345,028,266.68
  5. Step 5: Solve for x
    x = 32,345,028,266.68/208,115.50
  6. Step 6: Final answer
    x = 155,418.64

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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.