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Finding the Fourth Proportional to 219,884.70, 329,827.05 and 86,720.70

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Solution

The fourth proportional to 219,884.70, 329,827.05 and 86,720.70 is: 130,081.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,884.70 : 329,827.05 = 86,720.70 : x
  2. Step 2: Convert to fraction form
    219,884.70/329,827.05 = 86,720.70/x
  3. Step 3: Cross multiply
    219,884.70x = 329,827.05 × 86,720.70
  4. Step 4: Simplify right side
    219,884.70x = 28,602,832,654.94
  5. Step 5: Solve for x
    x = 28,602,832,654.94/219,884.70
  6. Step 6: Final answer
    x = 130,081.05

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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.