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Finding the Fourth Proportional to 123,313.95, 170,172.48 and 66,724.11

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Solution

The fourth proportional to 123,313.95, 170,172.48 and 66,724.11 is: 92,078.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,313.95 : 170,172.48 = 66,724.11 : x
  2. Step 2: Convert to fraction form
    123,313.95/170,172.48 = 66,724.11/x
  3. Step 3: Cross multiply
    123,313.95x = 170,172.48 × 66,724.11
  4. Step 4: Simplify right side
    123,313.95x = 11,354,607,274.49
  5. Step 5: Solve for x
    x = 11,354,607,274.49/123,313.95
  6. Step 6: Final answer
    x = 92,078.85

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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.