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Finding the Fourth Proportional to 55,699.88, 76,856.20 and 31,489.78

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Solution

The fourth proportional to 55,699.88, 76,856.20 and 31,489.78 is: 43,450.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,699.88 : 76,856.20 = 31,489.78 : x
  2. Step 2: Convert to fraction form
    55,699.88/76,856.20 = 31,489.78/x
  3. Step 3: Cross multiply
    55,699.88x = 76,856.20 × 31,489.78
  4. Step 4: Simplify right side
    55,699.88x = 2,420,184,829.64
  5. Step 5: Solve for x
    x = 2,420,184,829.64/55,699.88
  6. Step 6: Final answer
    x = 43,450.45

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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.