Home / 123,378.40-170,262-66,789.76

Finding the Fourth Proportional to 123,378.40, 170,262 and 66,789.76

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Solution

The fourth proportional to 123,378.40, 170,262 and 66,789.76 is: 92,169.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,378.40 : 170,262 = 66,789.76 : x
  2. Step 2: Convert to fraction form
    123,378.40/170,262 = 66,789.76/x
  3. Step 3: Cross multiply
    123,378.40x = 170,262 × 66,789.76
  4. Step 4: Simplify right side
    123,378.40x = 11,371,758,117.12
  5. Step 5: Solve for x
    x = 11,371,758,117.12/123,378.40
  6. Step 6: Final answer
    x = 92,169.76

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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.