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Finding the Fourth Proportional to 218,919.80, 328,124.55 and 100,603.10

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Solution

The fourth proportional to 218,919.80, 328,124.55 and 100,603.10 is: 150,787.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,919.80 : 328,124.55 = 100,603.10 : x
  2. Step 2: Convert to fraction form
    218,919.80/328,124.55 = 100,603.10/x
  3. Step 3: Cross multiply
    218,919.80x = 328,124.55 × 100,603.10
  4. Step 4: Simplify right side
    218,919.80x = 33,010,346,916.11
  5. Step 5: Solve for x
    x = 33,010,346,916.11/218,919.80
  6. Step 6: Final answer
    x = 150,787.40

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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.