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Finding the Fourth Proportional to 131,425.80, 197,138.70 and 130,259.40

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Solution

The fourth proportional to 131,425.80, 197,138.70 and 130,259.40 is: 195,389.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,425.80 : 197,138.70 = 130,259.40 : x
  2. Step 2: Convert to fraction form
    131,425.80/197,138.70 = 130,259.40/x
  3. Step 3: Cross multiply
    131,425.80x = 197,138.70 × 130,259.40
  4. Step 4: Simplify right side
    131,425.80x = 25,679,168,778.78
  5. Step 5: Solve for x
    x = 25,679,168,778.78/131,425.80
  6. Step 6: Final answer
    x = 195,389.10

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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.