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Finding the Fourth Proportional to 236,833.28, 326,820.21 and 129,407

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Solution

The fourth proportional to 236,833.28, 326,820.21 and 129,407 is: 178,576.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,833.28 : 326,820.21 = 129,407 : x
  2. Step 2: Convert to fraction form
    236,833.28/326,820.21 = 129,407/x
  3. Step 3: Cross multiply
    236,833.28x = 326,820.21 × 129,407
  4. Step 4: Simplify right side
    236,833.28x = 42,292,822,915.47
  5. Step 5: Solve for x
    x = 42,292,822,915.47/236,833.28
  6. Step 6: Final answer
    x = 178,576.35

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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.