Home / 56,919.87-78,554.12-31,428.77

Finding the Fourth Proportional to 56,919.87, 78,554.12 and 31,428.77

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Solution

The fourth proportional to 56,919.87, 78,554.12 and 31,428.77 is: 43,374.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,919.87 : 78,554.12 = 31,428.77 : x
  2. Step 2: Convert to fraction form
    56,919.87/78,554.12 = 31,428.77/x
  3. Step 3: Cross multiply
    56,919.87x = 78,554.12 × 31,428.77
  4. Step 4: Simplify right side
    56,919.87x = 2,468,858,820.12
  5. Step 5: Solve for x
    x = 2,468,858,820.12/56,919.87
  6. Step 6: Final answer
    x = 43,374.29

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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.