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Finding the Fourth Proportional to 172,512.80, 258,769.20 and 130,522.40

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Solution

The fourth proportional to 172,512.80, 258,769.20 and 130,522.40 is: 195,783.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,512.80 : 258,769.20 = 130,522.40 : x
  2. Step 2: Convert to fraction form
    172,512.80/258,769.20 = 130,522.40/x
  3. Step 3: Cross multiply
    172,512.80x = 258,769.20 × 130,522.40
  4. Step 4: Simplify right side
    172,512.80x = 33,775,177,030.08
  5. Step 5: Solve for x
    x = 33,775,177,030.08/172,512.80
  6. Step 6: Final answer
    x = 195,783.60

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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.