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Finding the Fourth Proportional to 172,032.40, 257,997.40 and 66,790.80

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Solution

The fourth proportional to 172,032.40, 257,997.40 and 66,790.80 is: 100,166.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,032.40 : 257,997.40 = 66,790.80 : x
  2. Step 2: Convert to fraction form
    172,032.40/257,997.40 = 66,790.80/x
  3. Step 3: Cross multiply
    172,032.40x = 257,997.40 × 66,790.80
  4. Step 4: Simplify right side
    172,032.40x = 17,231,852,743.92
  5. Step 5: Solve for x
    x = 17,231,852,743.92/172,032.40
  6. Step 6: Final answer
    x = 100,166.32

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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.