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Finding the Fourth Proportional to 56,855.88, 78,461.19 and 31,361.67

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Solution

The fourth proportional to 56,855.88, 78,461.19 and 31,361.67 is: 43,279.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,855.88 : 78,461.19 = 31,361.67 : x
  2. Step 2: Convert to fraction form
    56,855.88/78,461.19 = 31,361.67/x
  3. Step 3: Cross multiply
    56,855.88x = 78,461.19 × 31,361.67
  4. Step 4: Simplify right side
    56,855.88x = 2,460,673,948.59
  5. Step 5: Solve for x
    x = 2,460,673,948.59/56,855.88
  6. Step 6: Final answer
    x = 43,279.15

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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.