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Finding the Fourth Proportional to 218,871.18, 328,235.69 and 83,928.15

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Solution

The fourth proportional to 218,871.18, 328,235.69 and 83,928.15 is: 125,864.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,871.18 : 328,235.69 = 83,928.15 : x
  2. Step 2: Convert to fraction form
    218,871.18/328,235.69 = 83,928.15/x
  3. Step 3: Cross multiply
    218,871.18x = 328,235.69 × 83,928.15
  4. Step 4: Simplify right side
    218,871.18x = 27,548,214,225.67
  5. Step 5: Solve for x
    x = 27,548,214,225.67/218,871.18
  6. Step 6: Final answer
    x = 125,864.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.