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Finding the Fourth Proportional to 79,173.88, 109,260.30 and 42,875.80

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Solution

The fourth proportional to 79,173.88, 109,260.30 and 42,875.80 is: 59,168.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,173.88 : 109,260.30 = 42,875.80 : x
  2. Step 2: Convert to fraction form
    79,173.88/109,260.30 = 42,875.80/x
  3. Step 3: Cross multiply
    79,173.88x = 109,260.30 × 42,875.80
  4. Step 4: Simplify right side
    79,173.88x = 4,684,622,770.74
  5. Step 5: Solve for x
    x = 4,684,622,770.74/79,173.88
  6. Step 6: Final answer
    x = 59,168.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.