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Finding the Fourth Proportional to 210,157.40, 315,527.70 and 131,425.40

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Solution

The fourth proportional to 210,157.40, 315,527.70 and 131,425.40 is: 197,320.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,157.40 : 315,527.70 = 131,425.40 : x
  2. Step 2: Convert to fraction form
    210,157.40/315,527.70 = 131,425.40/x
  3. Step 3: Cross multiply
    210,157.40x = 315,527.70 × 131,425.40
  4. Step 4: Simplify right side
    210,157.40x = 41,468,354,183.58
  5. Step 5: Solve for x
    x = 41,468,354,183.58/210,157.40
  6. Step 6: Final answer
    x = 197,320.46

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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.