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Finding the Fourth Proportional to 164,512.80, 246,769.20 and 85,780.80

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Solution

The fourth proportional to 164,512.80, 246,769.20 and 85,780.80 is: 128,671.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,512.80 : 246,769.20 = 85,780.80 : x
  2. Step 2: Convert to fraction form
    164,512.80/246,769.20 = 85,780.80/x
  3. Step 3: Cross multiply
    164,512.80x = 246,769.20 × 85,780.80
  4. Step 4: Simplify right side
    164,512.80x = 21,168,059,391.36
  5. Step 5: Solve for x
    x = 21,168,059,391.36/164,512.80
  6. Step 6: Final answer
    x = 128,671.20

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1.5x scale

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.