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Finding the Fourth Proportional to 219,756.42, 329,642.73 and 61,989.09

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Solution

The fourth proportional to 219,756.42, 329,642.73 and 61,989.09 is: 92,985.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,756.42 : 329,642.73 = 61,989.09 : x
  2. Step 2: Convert to fraction form
    219,756.42/329,642.73 = 61,989.09/x
  3. Step 3: Cross multiply
    219,756.42x = 329,642.73 × 61,989.09
  4. Step 4: Simplify right side
    219,756.42x = 20,434,252,857.82
  5. Step 5: Solve for x
    x = 20,434,252,857.82/219,756.42
  6. Step 6: Final answer
    x = 92,985.92

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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.