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Finding the Fourth Proportional to 85,125.60, 127,688.40 and 80,632.80

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Solution

The fourth proportional to 85,125.60, 127,688.40 and 80,632.80 is: 120,949.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,125.60 : 127,688.40 = 80,632.80 : x
  2. Step 2: Convert to fraction form
    85,125.60/127,688.40 = 80,632.80/x
  3. Step 3: Cross multiply
    85,125.60x = 127,688.40 × 80,632.80
  4. Step 4: Simplify right side
    85,125.60x = 10,295,873,219.52
  5. Step 5: Solve for x
    x = 10,295,873,219.52/85,125.60
  6. Step 6: Final answer
    x = 120,949.20

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1.5x scale

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.