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Finding the Fourth Proportional to 109,909.80, 164,500.20 and 79,838.55

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Solution

The fourth proportional to 109,909.80, 164,500.20 and 79,838.55 is: 119,493.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,909.80 : 164,500.20 = 79,838.55 : x
  2. Step 2: Convert to fraction form
    109,909.80/164,500.20 = 79,838.55/x
  3. Step 3: Cross multiply
    109,909.80x = 164,500.20 × 79,838.55
  4. Step 4: Simplify right side
    109,909.80x = 13,133,457,442.71
  5. Step 5: Solve for x
    x = 13,133,457,442.71/109,909.80
  6. Step 6: Final answer
    x = 119,493.05

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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.