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Finding the Fourth Proportional to 158,371.84, 218,551.20 and 86,751.04

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Solution

The fourth proportional to 158,371.84, 218,551.20 and 86,751.04 is: 119,715.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,371.84 : 218,551.20 = 86,751.04 : x
  2. Step 2: Convert to fraction form
    158,371.84/218,551.20 = 86,751.04/x
  3. Step 3: Cross multiply
    158,371.84x = 218,551.20 × 86,751.04
  4. Step 4: Simplify right side
    158,371.84x = 18,959,543,893.25
  5. Step 5: Solve for x
    x = 18,959,543,893.25/158,371.84
  6. Step 6: Final answer
    x = 119,715.37

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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.