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Finding the Fourth Proportional to 109,155.70, 163,819.95 and 42,627.70

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Solution

The fourth proportional to 109,155.70, 163,819.95 and 42,627.70 is: 63,975.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,155.70 : 163,819.95 = 42,627.70 : x
  2. Step 2: Convert to fraction form
    109,155.70/163,819.95 = 42,627.70/x
  3. Step 3: Cross multiply
    109,155.70x = 163,819.95 × 42,627.70
  4. Step 4: Simplify right side
    109,155.70x = 6,983,267,682.62
  5. Step 5: Solve for x
    x = 6,983,267,682.62/109,155.70
  6. Step 6: Final answer
    x = 63,975.29

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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.