Home / 81,450.10-122,171.10-42,011.20

Finding the Fourth Proportional to 81,450.10, 122,171.10 and 42,011.20

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Solution

The fourth proportional to 81,450.10, 122,171.10 and 42,011.20 is: 63,014.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,450.10 : 122,171.10 = 42,011.20 : x
  2. Step 2: Convert to fraction form
    81,450.10/122,171.10 = 42,011.20/x
  3. Step 3: Cross multiply
    81,450.10x = 122,171.10 × 42,011.20
  4. Step 4: Simplify right side
    81,450.10x = 5,132,554,516.32
  5. Step 5: Solve for x
    x = 5,132,554,516.32/81,450.10
  6. Step 6: Final answer
    x = 63,014.71

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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.