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Finding the Fourth Proportional to 236,390, 326,218.99 and 128,962.30

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Solution

The fourth proportional to 236,390, 326,218.99 and 128,962.30 is: 177,968.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,390 : 326,218.99 = 128,962.30 : x
  2. Step 2: Convert to fraction form
    236,390/326,218.99 = 128,962.30/x
  3. Step 3: Cross multiply
    236,390x = 326,218.99 × 128,962.30
  4. Step 4: Simplify right side
    236,390x = 42,069,951,254.08
  5. Step 5: Solve for x
    x = 42,069,951,254.08/236,390
  6. Step 6: Final answer
    x = 177,968.40

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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.