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Finding the Fourth Proportional to 123,395.68, 170,283.09 and 69,678.91

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Solution

The fourth proportional to 123,395.68, 170,283.09 and 69,678.91 is: 96,155.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,395.68 : 170,283.09 = 69,678.91 : x
  2. Step 2: Convert to fraction form
    123,395.68/170,283.09 = 69,678.91/x
  3. Step 3: Cross multiply
    123,395.68x = 170,283.09 × 69,678.91
  4. Step 4: Simplify right side
    123,395.68x = 11,865,140,102.63
  5. Step 5: Solve for x
    x = 11,865,140,102.63/123,395.68
  6. Step 6: Final answer
    x = 96,155.23

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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.