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Finding the Fourth Proportional to 219,464.80, 329,000.10 and 86,435.80

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Solution

The fourth proportional to 219,464.80, 329,000.10 and 86,435.80 is: 129,576.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,464.80 : 329,000.10 = 86,435.80 : x
  2. Step 2: Convert to fraction form
    219,464.80/329,000.10 = 86,435.80/x
  3. Step 3: Cross multiply
    219,464.80x = 329,000.10 × 86,435.80
  4. Step 4: Simplify right side
    219,464.80x = 28,437,386,843.58
  5. Step 5: Solve for x
    x = 28,437,386,843.58/219,464.80
  6. Step 6: Final answer
    x = 129,576.07

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1.5x scale

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.