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Finding the Fourth Proportional to 172,102.80, 258,154.20 and 130,112.40

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Solution

The fourth proportional to 172,102.80, 258,154.20 and 130,112.40 is: 195,168.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,102.80 : 258,154.20 = 130,112.40 : x
  2. Step 2: Convert to fraction form
    172,102.80/258,154.20 = 130,112.40/x
  3. Step 3: Cross multiply
    172,102.80x = 258,154.20 × 130,112.40
  4. Step 4: Simplify right side
    172,102.80x = 33,589,062,532.08
  5. Step 5: Solve for x
    x = 33,589,062,532.08/172,102.80
  6. Step 6: Final answer
    x = 195,168.60

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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.