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Finding the Fourth Proportional to 123,356.81, 170,222.89 and 69,647.12

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Solution

The fourth proportional to 123,356.81, 170,222.89 and 69,647.12 is: 96,107.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,356.81 : 170,222.89 = 69,647.12 : x
  2. Step 2: Convert to fraction form
    123,356.81/170,222.89 = 69,647.12/x
  3. Step 3: Cross multiply
    123,356.81x = 170,222.89 × 69,647.12
  4. Step 4: Simplify right side
    123,356.81x = 11,855,534,943.66
  5. Step 5: Solve for x
    x = 11,855,534,943.66/123,356.81
  6. Step 6: Final answer
    x = 96,107.67

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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.