Home / 57,158.20-78,878.30-31,666.22

Finding the Fourth Proportional to 57,158.20, 78,878.30 and 31,666.22

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Solution

The fourth proportional to 57,158.20, 78,878.30 and 31,666.22 is: 43,699.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,158.20 : 78,878.30 = 31,666.22 : x
  2. Step 2: Convert to fraction form
    57,158.20/78,878.30 = 31,666.22/x
  3. Step 3: Cross multiply
    57,158.20x = 78,878.30 × 31,666.22
  4. Step 4: Simplify right side
    57,158.20x = 2,497,777,719.06
  5. Step 5: Solve for x
    x = 2,497,777,719.06/57,158.20
  6. Step 6: Final answer
    x = 43,699.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.