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Finding the Fourth Proportional to 219,641.66, 329,337.64 and 86,449.71

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Solution

The fourth proportional to 219,641.66, 329,337.64 and 86,449.71 is: 129,625.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,641.66 : 329,337.64 = 86,449.71 : x
  2. Step 2: Convert to fraction form
    219,641.66/329,337.64 = 86,449.71/x
  3. Step 3: Cross multiply
    219,641.66x = 329,337.64 × 86,449.71
  4. Step 4: Simplify right side
    219,641.66x = 28,471,143,037.84
  5. Step 5: Solve for x
    x = 28,471,143,037.84/219,641.66
  6. Step 6: Final answer
    x = 129,625.43

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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.