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Finding the Fourth Proportional to 219,630.45, 329,527.68 and 86,603.45

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Solution

The fourth proportional to 219,630.45, 329,527.68 and 86,603.45 is: 129,937.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,630.45 : 329,527.68 = 86,603.45 : x
  2. Step 2: Convert to fraction form
    219,630.45/329,527.68 = 86,603.45/x
  3. Step 3: Cross multiply
    219,630.45x = 329,527.68 × 86,603.45
  4. Step 4: Simplify right side
    219,630.45x = 28,538,232,310.86
  5. Step 5: Solve for x
    x = 28,538,232,310.86/219,630.45
  6. Step 6: Final answer
    x = 129,937.50

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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.