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Finding the Fourth Proportional to 56,680.80, 84,965.40 and 31,732.80

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Solution

The fourth proportional to 56,680.80, 84,965.40 and 31,732.80 is: 47,567.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,680.80 : 84,965.40 = 31,732.80 : x
  2. Step 2: Convert to fraction form
    56,680.80/84,965.40 = 31,732.80/x
  3. Step 3: Cross multiply
    56,680.80x = 84,965.40 × 31,732.80
  4. Step 4: Simplify right side
    56,680.80x = 2,696,190,045.12
  5. Step 5: Solve for x
    x = 2,696,190,045.12/56,680.80
  6. Step 6: Final answer
    x = 47,567.96

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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.