Home / 42,777.21-64,178.12-21,716.40

Finding the Fourth Proportional to 42,777.21, 64,178.12 and 21,716.40

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Solution

The fourth proportional to 42,777.21, 64,178.12 and 21,716.40 is: 32,580.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,777.21 : 64,178.12 = 21,716.40 : x
  2. Step 2: Convert to fraction form
    42,777.21/64,178.12 = 21,716.40/x
  3. Step 3: Cross multiply
    42,777.21x = 64,178.12 × 21,716.40
  4. Step 4: Simplify right side
    42,777.21x = 1,393,718,020.13
  5. Step 5: Solve for x
    x = 1,393,718,020.13/42,777.21
  6. Step 6: Final answer
    x = 32,580.85

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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.