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Finding the Fourth Proportional to 123,572.63, 170,499.65 and 69,856.49

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Solution

The fourth proportional to 123,572.63, 170,499.65 and 69,856.49 is: 96,384.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,572.63 : 170,499.65 = 69,856.49 : x
  2. Step 2: Convert to fraction form
    123,572.63/170,499.65 = 69,856.49/x
  3. Step 3: Cross multiply
    123,572.63x = 170,499.65 × 69,856.49
  4. Step 4: Simplify right side
    123,572.63x = 11,910,505,893.45
  5. Step 5: Solve for x
    x = 11,910,505,893.45/123,572.63
  6. Step 6: Final answer
    x = 96,384.66

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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.