Home / 74,530.20-111,708.90-30,127.80

Finding the Fourth Proportional to 74,530.20, 111,708.90 and 30,127.80

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Solution

The fourth proportional to 74,530.20, 111,708.90 and 30,127.80 is: 45,156.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,530.20 : 111,708.90 = 30,127.80 : x
  2. Step 2: Convert to fraction form
    74,530.20/111,708.90 = 30,127.80/x
  3. Step 3: Cross multiply
    74,530.20x = 111,708.90 × 30,127.80
  4. Step 4: Simplify right side
    74,530.20x = 3,365,543,397.42
  5. Step 5: Solve for x
    x = 3,365,543,397.42/74,530.20
  6. Step 6: Final answer
    x = 45,156.77

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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.