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Finding the Fourth Proportional to 123,218.52, 170,041.40 and 66,629.76

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Solution

The fourth proportional to 123,218.52, 170,041.40 and 66,629.76 is: 91,948.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,218.52 : 170,041.40 = 66,629.76 : x
  2. Step 2: Convert to fraction form
    123,218.52/170,041.40 = 66,629.76/x
  3. Step 3: Cross multiply
    123,218.52x = 170,041.40 × 66,629.76
  4. Step 4: Simplify right side
    123,218.52x = 11,329,817,672.06
  5. Step 5: Solve for x
    x = 11,329,817,672.06/123,218.52
  6. Step 6: Final answer
    x = 91,948.98

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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.