Home / 123,206.40-170,025-66,617.88

Finding the Fourth Proportional to 123,206.40, 170,025 and 66,617.88

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Solution

The fourth proportional to 123,206.40, 170,025 and 66,617.88 is: 91,932.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,206.40 : 170,025 = 66,617.88 : x
  2. Step 2: Convert to fraction form
    123,206.40/170,025 = 66,617.88/x
  3. Step 3: Cross multiply
    123,206.40x = 170,025 × 66,617.88
  4. Step 4: Simplify right side
    123,206.40x = 11,326,705,047
  5. Step 5: Solve for x
    x = 11,326,705,047/123,206.40
  6. Step 6: Final answer
    x = 91,932.77

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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.