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Finding the Fourth Proportional to 219,984.40, 329,911.80 and 86,820.40

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Solution

The fourth proportional to 219,984.40, 329,911.80 and 86,820.40 is: 130,205.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,984.40 : 329,911.80 = 86,820.40 : x
  2. Step 2: Convert to fraction form
    219,984.40/329,911.80 = 86,820.40/x
  3. Step 3: Cross multiply
    219,984.40x = 329,911.80 × 86,820.40
  4. Step 4: Simplify right side
    219,984.40x = 28,643,074,440.72
  5. Step 5: Solve for x
    x = 28,643,074,440.72/219,984.40
  6. Step 6: Final answer
    x = 130,205.03

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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.