Home / 56,921.87-78,556.88-31,430.77

Finding the Fourth Proportional to 56,921.87, 78,556.88 and 31,430.77

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Solution

The fourth proportional to 56,921.87, 78,556.88 and 31,430.77 is: 43,377.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,921.87 : 78,556.88 = 31,430.77 : x
  2. Step 2: Convert to fraction form
    56,921.87/78,556.88 = 31,430.77/x
  3. Step 3: Cross multiply
    56,921.87x = 78,556.88 × 31,430.77
  4. Step 4: Simplify right side
    56,921.87x = 2,469,102,677.26
  5. Step 5: Solve for x
    x = 2,469,102,677.26/56,921.87
  6. Step 6: Final answer
    x = 43,377.05

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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.