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Finding the Fourth Proportional to 55,212, 76,187.76 and 31,339.68

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Solution

The fourth proportional to 55,212, 76,187.76 and 31,339.68 is: 43,246.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,212 : 76,187.76 = 31,339.68 : x
  2. Step 2: Convert to fraction form
    55,212/76,187.76 = 31,339.68/x
  3. Step 3: Cross multiply
    55,212x = 76,187.76 × 31,339.68
  4. Step 4: Simplify right side
    55,212x = 2,387,700,018.32
  5. Step 5: Solve for x
    x = 2,387,700,018.32/55,212
  6. Step 6: Final answer
    x = 43,246.03

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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.