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Finding the Fourth Proportional to 56,236.50, 77,606.51 and 31,086

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Solution

The fourth proportional to 56,236.50, 77,606.51 and 31,086 is: 42,898.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,236.50 : 77,606.51 = 31,086 : x
  2. Step 2: Convert to fraction form
    56,236.50/77,606.51 = 31,086/x
  3. Step 3: Cross multiply
    56,236.50x = 77,606.51 × 31,086
  4. Step 4: Simplify right side
    56,236.50x = 2,412,475,969.86
  5. Step 5: Solve for x
    x = 2,412,475,969.86/56,236.50
  6. Step 6: Final answer
    x = 42,898.76

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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.