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Finding the Fourth Proportional to 123,486.93, 170,415.29 and 69,770.77

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Solution

The fourth proportional to 123,486.93, 170,415.29 and 69,770.77 is: 96,285.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,486.93 : 170,415.29 = 69,770.77 : x
  2. Step 2: Convert to fraction form
    123,486.93/170,415.29 = 69,770.77/x
  3. Step 3: Cross multiply
    123,486.93x = 170,415.29 × 69,770.77
  4. Step 4: Simplify right side
    123,486.93x = 11,890,005,751.46
  5. Step 5: Solve for x
    x = 11,890,005,751.46/123,486.93
  6. Step 6: Final answer
    x = 96,285.54

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1.5x scale

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.