Home / 42,777.98-64,183.40-30,139.88

Finding the Fourth Proportional to 42,777.98, 64,183.40 and 30,139.88

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Solution

The fourth proportional to 42,777.98, 64,183.40 and 30,139.88 is: 45,221.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,777.98 : 64,183.40 = 30,139.88 : x
  2. Step 2: Convert to fraction form
    42,777.98/64,183.40 = 30,139.88/x
  3. Step 3: Cross multiply
    42,777.98x = 64,183.40 × 30,139.88
  4. Step 4: Simplify right side
    42,777.98x = 1,934,479,973.99
  5. Step 5: Solve for x
    x = 1,934,479,973.99/42,777.98
  6. Step 6: Final answer
    x = 45,221.40

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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.