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Finding the Fourth Proportional to 158,571.81, 218,830.05 and 85,975.29

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Solution

The fourth proportional to 158,571.81, 218,830.05 and 85,975.29 is: 118,646.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,571.81 : 218,830.05 = 85,975.29 : x
  2. Step 2: Convert to fraction form
    158,571.81/218,830.05 = 85,975.29/x
  3. Step 3: Cross multiply
    158,571.81x = 218,830.05 × 85,975.29
  4. Step 4: Simplify right side
    158,571.81x = 18,813,977,009.46
  5. Step 5: Solve for x
    x = 18,813,977,009.46/158,571.81
  6. Step 6: Final answer
    x = 118,646.42

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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.