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Finding the Fourth Proportional to 109,384.80, 163,712.70 and 79,313.55

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Solution

The fourth proportional to 109,384.80, 163,712.70 and 79,313.55 is: 118,706.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,384.80 : 163,712.70 = 79,313.55 : x
  2. Step 2: Convert to fraction form
    109,384.80/163,712.70 = 79,313.55/x
  3. Step 3: Cross multiply
    109,384.80x = 163,712.70 × 79,313.55
  4. Step 4: Simplify right side
    109,384.80x = 12,984,635,417.09
  5. Step 5: Solve for x
    x = 12,984,635,417.09/109,384.80
  6. Step 6: Final answer
    x = 118,706.03

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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.