Home / 56,836-78,433.68-31,687.12

Finding the Fourth Proportional to 56,836, 78,433.68 and 31,687.12

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Solution

The fourth proportional to 56,836, 78,433.68 and 31,687.12 is: 43,728.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,836 : 78,433.68 = 31,687.12 : x
  2. Step 2: Convert to fraction form
    56,836/78,433.68 = 31,687.12/x
  3. Step 3: Cross multiply
    56,836x = 78,433.68 × 31,687.12
  4. Step 4: Simplify right side
    56,836x = 2,485,337,430.20
  5. Step 5: Solve for x
    x = 2,485,337,430.20/56,836
  6. Step 6: Final answer
    x = 43,728.23

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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.