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Finding the Fourth Proportional to 123,740.73, 170,839.58 and 85,045.19

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Solution

The fourth proportional to 123,740.73, 170,839.58 and 85,045.19 is: 117,415.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,740.73 : 170,839.58 = 85,045.19 : x
  2. Step 2: Convert to fraction form
    123,740.73/170,839.58 = 85,045.19/x
  3. Step 3: Cross multiply
    123,740.73x = 170,839.58 × 85,045.19
  4. Step 4: Simplify right side
    123,740.73x = 14,529,083,261.20
  5. Step 5: Solve for x
    x = 14,529,083,261.20/123,740.73
  6. Step 6: Final answer
    x = 117,415.53

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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.