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Finding the Fourth Proportional to 143,309.30, 214,963.65 and 38,128.28

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Solution

The fourth proportional to 143,309.30, 214,963.65 and 38,128.28 is: 57,192.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,309.30 : 214,963.65 = 38,128.28 : x
  2. Step 2: Convert to fraction form
    143,309.30/214,963.65 = 38,128.28/x
  3. Step 3: Cross multiply
    143,309.30x = 214,963.65 × 38,128.28
  4. Step 4: Simplify right side
    143,309.30x = 8,196,193,162.20
  5. Step 5: Solve for x
    x = 8,196,193,162.20/143,309.30
  6. Step 6: Final answer
    x = 57,192.33

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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.