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Finding the Fourth Proportional to 219,189.72, 328,758.84 and 61,430.88

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Solution

The fourth proportional to 219,189.72, 328,758.84 and 61,430.88 is: 92,139.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,189.72 : 328,758.84 = 61,430.88 : x
  2. Step 2: Convert to fraction form
    219,189.72/328,758.84 = 61,430.88/x
  3. Step 3: Cross multiply
    219,189.72x = 328,758.84 × 61,430.88
  4. Step 4: Simplify right side
    219,189.72x = 20,195,944,848.98
  5. Step 5: Solve for x
    x = 20,195,944,848.98/219,189.72
  6. Step 6: Final answer
    x = 92,139.11

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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.