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Finding the Fourth Proportional to 236,409.60, 326,233.26 and 128,978.76

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Solution

The fourth proportional to 236,409.60, 326,233.26 and 128,978.76 is: 177,984.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,409.60 : 326,233.26 = 128,978.76 : x
  2. Step 2: Convert to fraction form
    236,409.60/326,233.26 = 128,978.76/x
  3. Step 3: Cross multiply
    236,409.60x = 326,233.26 × 128,978.76
  4. Step 4: Simplify right side
    236,409.60x = 42,077,161,345.56
  5. Step 5: Solve for x
    x = 42,077,161,345.56/236,409.60
  6. Step 6: Final answer
    x = 177,984.15

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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.