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Finding the Fourth Proportional to 56,362.88, 77,780.79 and 31,212.38

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Solution

The fourth proportional to 56,362.88, 77,780.79 and 31,212.38 is: 43,073.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,362.88 : 77,780.79 = 31,212.38 : x
  2. Step 2: Convert to fraction form
    56,362.88/77,780.79 = 31,212.38/x
  3. Step 3: Cross multiply
    56,362.88x = 77,780.79 × 31,212.38
  4. Step 4: Simplify right side
    56,362.88x = 2,427,723,185.28
  5. Step 5: Solve for x
    x = 2,427,723,185.28/56,362.88
  6. Step 6: Final answer
    x = 43,073.09

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1.5x scale

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.