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Finding the Fourth Proportional to 236,018.60, 353,978.70 and 86,329.40

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Solution

The fourth proportional to 236,018.60, 353,978.70 and 86,329.40 is: 129,476.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,018.60 : 353,978.70 = 86,329.40 : x
  2. Step 2: Convert to fraction form
    236,018.60/353,978.70 = 86,329.40/x
  3. Step 3: Cross multiply
    236,018.60x = 353,978.70 × 86,329.40
  4. Step 4: Simplify right side
    236,018.60x = 30,558,768,783.78
  5. Step 5: Solve for x
    x = 30,558,768,783.78/236,018.60
  6. Step 6: Final answer
    x = 129,476.10

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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.