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Finding the Fourth Proportional to 202,991.56, 280,128.95 and 112,353.82

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Solution

The fourth proportional to 202,991.56, 280,128.95 and 112,353.82 is: 155,048.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,991.56 : 280,128.95 = 112,353.82 : x
  2. Step 2: Convert to fraction form
    202,991.56/280,128.95 = 112,353.82/x
  3. Step 3: Cross multiply
    202,991.56x = 280,128.95 × 112,353.82
  4. Step 4: Simplify right side
    202,991.56x = 31,473,556,784.32
  5. Step 5: Solve for x
    x = 31,473,556,784.32/202,991.56
  6. Step 6: Final answer
    x = 155,048.60

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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.