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Finding the Fourth Proportional to 60,990.60, 91,485.92 and 40,209.24

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Solution

The fourth proportional to 60,990.60, 91,485.92 and 40,209.24 is: 60,313.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,990.60 : 91,485.92 = 40,209.24 : x
  2. Step 2: Convert to fraction form
    60,990.60/91,485.92 = 40,209.24/x
  3. Step 3: Cross multiply
    60,990.60x = 91,485.92 × 40,209.24
  4. Step 4: Simplify right side
    60,990.60x = 3,678,579,313.90
  5. Step 5: Solve for x
    x = 3,678,579,313.90/60,990.60
  6. Step 6: Final answer
    x = 60,313.87

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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.