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Finding the Fourth Proportional to 219,076.65, 328,488.21 and 85,800.87

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Solution

The fourth proportional to 219,076.65, 328,488.21 and 85,800.87 is: 128,651.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,076.65 : 328,488.21 = 85,800.87 : x
  2. Step 2: Convert to fraction form
    219,076.65/328,488.21 = 85,800.87/x
  3. Step 3: Cross multiply
    219,076.65x = 328,488.21 × 85,800.87
  4. Step 4: Simplify right side
    219,076.65x = 28,184,574,202.74
  5. Step 5: Solve for x
    x = 28,184,574,202.74/219,076.65
  6. Step 6: Final answer
    x = 128,651.66

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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.