Home / 56,984.85-78,638.90-31,490.50

Finding the Fourth Proportional to 56,984.85, 78,638.90 and 31,490.50

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Solution

The fourth proportional to 56,984.85, 78,638.90 and 31,490.50 is: 43,456.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,984.85 : 78,638.90 = 31,490.50 : x
  2. Step 2: Convert to fraction form
    56,984.85/78,638.90 = 31,490.50/x
  3. Step 3: Cross multiply
    56,984.85x = 78,638.90 × 31,490.50
  4. Step 4: Simplify right side
    56,984.85x = 2,476,378,280.45
  5. Step 5: Solve for x
    x = 2,476,378,280.45/56,984.85
  6. Step 6: Final answer
    x = 43,456.78

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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.