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Finding the Fourth Proportional to 212,325.38, 318,488.09 and 54,553.84

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Solution

The fourth proportional to 212,325.38, 318,488.09 and 54,553.84 is: 81,830.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,325.38 : 318,488.09 = 54,553.84 : x
  2. Step 2: Convert to fraction form
    212,325.38/318,488.09 = 54,553.84/x
  3. Step 3: Cross multiply
    212,325.38x = 318,488.09 × 54,553.84
  4. Step 4: Simplify right side
    212,325.38x = 17,374,748,303.77
  5. Step 5: Solve for x
    x = 17,374,748,303.77/212,325.38
  6. Step 6: Final answer
    x = 81,830.77

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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.