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Finding the Fourth Proportional to 172,033.40, 257,998.90 and 66,791.80

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Solution

The fourth proportional to 172,033.40, 257,998.90 and 66,791.80 is: 100,167.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,033.40 : 257,998.90 = 66,791.80 : x
  2. Step 2: Convert to fraction form
    172,033.40/257,998.90 = 66,791.80/x
  3. Step 3: Cross multiply
    172,033.40x = 257,998.90 × 66,791.80
  4. Step 4: Simplify right side
    172,033.40x = 17,232,210,929.02
  5. Step 5: Solve for x
    x = 17,232,210,929.02/172,033.40
  6. Step 6: Final answer
    x = 100,167.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.