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Finding the Fourth Proportional to 218,928.71, 328,406.91 and 92,545.40

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Solution

The fourth proportional to 218,928.71, 328,406.91 and 92,545.40 is: 138,823.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,928.71 : 328,406.91 = 92,545.40 : x
  2. Step 2: Convert to fraction form
    218,928.71/328,406.91 = 92,545.40/x
  3. Step 3: Cross multiply
    218,928.71x = 328,406.91 × 92,545.40
  4. Step 4: Simplify right side
    218,928.71x = 30,392,548,848.71
  5. Step 5: Solve for x
    x = 30,392,548,848.71/218,928.71
  6. Step 6: Final answer
    x = 138,823.95

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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.