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Finding the Fourth Proportional to 123,216.68, 170,039.21 and 66,628.06

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Solution

The fourth proportional to 123,216.68, 170,039.21 and 66,628.06 is: 91,946.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,216.68 : 170,039.21 = 66,628.06 : x
  2. Step 2: Convert to fraction form
    123,216.68/170,039.21 = 66,628.06/x
  3. Step 3: Cross multiply
    123,216.68x = 170,039.21 × 66,628.06
  4. Step 4: Simplify right side
    123,216.68x = 11,329,381,927.99
  5. Step 5: Solve for x
    x = 11,329,381,927.99/123,216.68
  6. Step 6: Final answer
    x = 91,946.82

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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.