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Finding the Fourth Proportional to 171,971.40, 257,438.70 and 151,235.40

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Solution

The fourth proportional to 171,971.40, 257,438.70 and 151,235.40 is: 226,397.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,971.40 : 257,438.70 = 151,235.40 : x
  2. Step 2: Convert to fraction form
    171,971.40/257,438.70 = 151,235.40/x
  3. Step 3: Cross multiply
    171,971.40x = 257,438.70 × 151,235.40
  4. Step 4: Simplify right side
    171,971.40x = 38,933,844,769.98
  5. Step 5: Solve for x
    x = 38,933,844,769.98/171,971.40
  6. Step 6: Final answer
    x = 226,397.21

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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.