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Finding the Fourth Proportional to 123,302.70, 170,139.50 and 74,879.46

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Solution

The fourth proportional to 123,302.70, 170,139.50 and 74,879.46 is: 103,322.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,302.70 : 170,139.50 = 74,879.46 : x
  2. Step 2: Convert to fraction form
    123,302.70/170,139.50 = 74,879.46/x
  3. Step 3: Cross multiply
    123,302.70x = 170,139.50 × 74,879.46
  4. Step 4: Simplify right side
    123,302.70x = 12,739,953,884.67
  5. Step 5: Solve for x
    x = 12,739,953,884.67/123,302.70
  6. Step 6: Final answer
    x = 103,322.59

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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.