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Finding the Fourth Proportional to 123,385.58, 170,265.21 and 69,681.50

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Solution

The fourth proportional to 123,385.58, 170,265.21 and 69,681.50 is: 96,156.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,385.58 : 170,265.21 = 69,681.50 : x
  2. Step 2: Convert to fraction form
    123,385.58/170,265.21 = 69,681.50/x
  3. Step 3: Cross multiply
    123,385.58x = 170,265.21 × 69,681.50
  4. Step 4: Simplify right side
    123,385.58x = 11,864,335,230.62
  5. Step 5: Solve for x
    x = 11,864,335,230.62/123,385.58
  6. Step 6: Final answer
    x = 96,156.58

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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.