Home / 123,905.78-170,992.08-67,317.20

Finding the Fourth Proportional to 123,905.78, 170,992.08 and 67,317.20

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Solution

The fourth proportional to 123,905.78, 170,992.08 and 67,317.20 is: 92,898.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,905.78 : 170,992.08 = 67,317.20 : x
  2. Step 2: Convert to fraction form
    123,905.78/170,992.08 = 67,317.20/x
  3. Step 3: Cross multiply
    123,905.78x = 170,992.08 × 67,317.20
  4. Step 4: Simplify right side
    123,905.78x = 11,510,708,047.78
  5. Step 5: Solve for x
    x = 11,510,708,047.78/123,905.78
  6. Step 6: Final answer
    x = 92,898.88

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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.