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Finding the Fourth Proportional to 56,865.80, 85,313.82 and 19,425.81

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Solution

The fourth proportional to 56,865.80, 85,313.82 and 19,425.81 is: 29,143.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,865.80 : 85,313.82 = 19,425.81 : x
  2. Step 2: Convert to fraction form
    56,865.80/85,313.82 = 19,425.81/x
  3. Step 3: Cross multiply
    56,865.80x = 85,313.82 × 19,425.81
  4. Step 4: Simplify right side
    56,865.80x = 1,657,290,450.47
  5. Step 5: Solve for x
    x = 1,657,290,450.47/56,865.80
  6. Step 6: Final answer
    x = 29,143.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.