Home / 55,809-77,021.28-30,663.36

Finding the Fourth Proportional to 55,809, 77,021.28 and 30,663.36

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Solution

The fourth proportional to 55,809, 77,021.28 and 30,663.36 is: 42,318.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,809 : 77,021.28 = 30,663.36 : x
  2. Step 2: Convert to fraction form
    55,809/77,021.28 = 30,663.36/x
  3. Step 3: Cross multiply
    55,809x = 77,021.28 × 30,663.36
  4. Step 4: Simplify right side
    55,809x = 2,361,731,236.30
  5. Step 5: Solve for x
    x = 2,361,731,236.30/55,809
  6. Step 6: Final answer
    x = 42,318.11

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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.