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Finding the Fourth Proportional to 236,430.80, 354,646.20 and 161,781.20

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Solution

The fourth proportional to 236,430.80, 354,646.20 and 161,781.20 is: 242,671.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,430.80 : 354,646.20 = 161,781.20 : x
  2. Step 2: Convert to fraction form
    236,430.80/354,646.20 = 161,781.20/x
  3. Step 3: Cross multiply
    236,430.80x = 354,646.20 × 161,781.20
  4. Step 4: Simplify right side
    236,430.80x = 57,375,087,811.44
  5. Step 5: Solve for x
    x = 57,375,087,811.44/236,430.80
  6. Step 6: Final answer
    x = 242,671.80

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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.