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Finding the Fourth Proportional to 158,561.14, 218,812.68 and 86,940.94

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Solution

The fourth proportional to 158,561.14, 218,812.68 and 86,940.94 is: 119,977.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,561.14 : 218,812.68 = 86,940.94 : x
  2. Step 2: Convert to fraction form
    158,561.14/218,812.68 = 86,940.94/x
  3. Step 3: Cross multiply
    158,561.14x = 218,812.68 × 86,940.94
  4. Step 4: Simplify right side
    158,561.14x = 19,023,780,083.12
  5. Step 5: Solve for x
    x = 19,023,780,083.12/158,561.14
  6. Step 6: Final answer
    x = 119,977.57

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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.