Home / 56,981.88-78,634.80-31,489.56

Finding the Fourth Proportional to 56,981.88, 78,634.80 and 31,489.56

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Solution

The fourth proportional to 56,981.88, 78,634.80 and 31,489.56 is: 43,455.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,981.88 : 78,634.80 = 31,489.56 : x
  2. Step 2: Convert to fraction form
    56,981.88/78,634.80 = 31,489.56/x
  3. Step 3: Cross multiply
    56,981.88x = 78,634.80 × 31,489.56
  4. Step 4: Simplify right side
    56,981.88x = 2,476,175,252.69
  5. Step 5: Solve for x
    x = 2,476,175,252.69/56,981.88
  6. Step 6: Final answer
    x = 43,455.49

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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.