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Finding the Fourth Proportional to 145,990.92, 218,986.38 and 57,286.20

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Solution

The fourth proportional to 145,990.92, 218,986.38 and 57,286.20 is: 85,929.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,990.92 : 218,986.38 = 57,286.20 : x
  2. Step 2: Convert to fraction form
    145,990.92/218,986.38 = 57,286.20/x
  3. Step 3: Cross multiply
    145,990.92x = 218,986.38 × 57,286.20
  4. Step 4: Simplify right side
    145,990.92x = 12,544,897,561.96
  5. Step 5: Solve for x
    x = 12,544,897,561.96/145,990.92
  6. Step 6: Final answer
    x = 85,929.30

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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.