Home / 55,012.29-75,918.76-31,138.45

Finding the Fourth Proportional to 55,012.29, 75,918.76 and 31,138.45

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Solution

The fourth proportional to 55,012.29, 75,918.76 and 31,138.45 is: 42,972.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,012.29 : 75,918.76 = 31,138.45 : x
  2. Step 2: Convert to fraction form
    55,012.29/75,918.76 = 31,138.45/x
  3. Step 3: Cross multiply
    55,012.29x = 75,918.76 × 31,138.45
  4. Step 4: Simplify right side
    55,012.29x = 2,363,992,419.83
  5. Step 5: Solve for x
    x = 2,363,992,419.83/55,012.29
  6. Step 6: Final answer
    x = 42,972.08

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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.