Home / 57,156.12-78,878.41-31,665.28

Finding the Fourth Proportional to 57,156.12, 78,878.41 and 31,665.28

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Solution

The fourth proportional to 57,156.12, 78,878.41 and 31,665.28 is: 43,699.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,156.12 : 78,878.41 = 31,665.28 : x
  2. Step 2: Convert to fraction form
    57,156.12/78,878.41 = 31,665.28/x
  3. Step 3: Cross multiply
    57,156.12x = 78,878.41 × 31,665.28
  4. Step 4: Simplify right side
    57,156.12x = 2,497,706,938.60
  5. Step 5: Solve for x
    x = 2,497,706,938.60/57,156.12
  6. Step 6: Final answer
    x = 43,699.73

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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.