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Finding the Fourth Proportional to 55,555.56, 76,664.75 and 31,689.90

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Solution

The fourth proportional to 55,555.56, 76,664.75 and 31,689.90 is: 43,730.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,555.56 : 76,664.75 = 31,689.90 : x
  2. Step 2: Convert to fraction form
    55,555.56/76,664.75 = 31,689.90/x
  3. Step 3: Cross multiply
    55,555.56x = 76,664.75 × 31,689.90
  4. Step 4: Simplify right side
    55,555.56x = 2,429,498,102.58
  5. Step 5: Solve for x
    x = 2,429,498,102.58/55,555.56
  6. Step 6: Final answer
    x = 43,730.96

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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.