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Finding the Fourth Proportional to 79,875.40, 110,179.20 and 51,185.40

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Solution

The fourth proportional to 79,875.40, 110,179.20 and 51,185.40 is: 70,604.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,875.40 : 110,179.20 = 51,185.40 : x
  2. Step 2: Convert to fraction form
    79,875.40/110,179.20 = 51,185.40/x
  3. Step 3: Cross multiply
    79,875.40x = 110,179.20 × 51,185.40
  4. Step 4: Simplify right side
    79,875.40x = 5,639,566,423.68
  5. Step 5: Solve for x
    x = 5,639,566,423.68/79,875.40
  6. Step 6: Final answer
    x = 70,604.55

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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.