Home / 123,506.18-170,438.28-66,917.78

Finding the Fourth Proportional to 123,506.18, 170,438.28 and 66,917.78

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Solution

The fourth proportional to 123,506.18, 170,438.28 and 66,917.78 is: 92,346.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,506.18 : 170,438.28 = 66,917.78 : x
  2. Step 2: Convert to fraction form
    123,506.18/170,438.28 = 66,917.78/x
  3. Step 3: Cross multiply
    123,506.18x = 170,438.28 × 66,917.78
  4. Step 4: Simplify right side
    123,506.18x = 11,405,351,324.62
  5. Step 5: Solve for x
    x = 11,405,351,324.62/123,506.18
  6. Step 6: Final answer
    x = 92,346.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.