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Finding the Fourth Proportional to 158,364.64, 218,543.28 and 86,745.84

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Solution

The fourth proportional to 158,364.64, 218,543.28 and 86,745.84 is: 119,709.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,364.64 : 218,543.28 = 86,745.84 : x
  2. Step 2: Convert to fraction form
    158,364.64/218,543.28 = 86,745.84/x
  3. Step 3: Cross multiply
    158,364.64x = 218,543.28 × 86,745.84
  4. Step 4: Simplify right side
    158,364.64x = 18,957,720,399.96
  5. Step 5: Solve for x
    x = 18,957,720,399.96/158,364.64
  6. Step 6: Final answer
    x = 119,709.30

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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.