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Finding the Fourth Proportional to 236,460.80, 354,691.20 and 78,694.40

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Solution

The fourth proportional to 236,460.80, 354,691.20 and 78,694.40 is: 118,041.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,460.80 : 354,691.20 = 78,694.40 : x
  2. Step 2: Convert to fraction form
    236,460.80/354,691.20 = 78,694.40/x
  3. Step 3: Cross multiply
    236,460.80x = 354,691.20 × 78,694.40
  4. Step 4: Simplify right side
    236,460.80x = 27,912,211,169.28
  5. Step 5: Solve for x
    x = 27,912,211,169.28/236,460.80
  6. Step 6: Final answer
    x = 118,041.60

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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.