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Finding the Fourth Proportional to 56,471.50, 77,930.67 and 31,321

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Solution

The fourth proportional to 56,471.50, 77,930.67 and 31,321 is: 43,222.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,471.50 : 77,930.67 = 31,321 : x
  2. Step 2: Convert to fraction form
    56,471.50/77,930.67 = 31,321/x
  3. Step 3: Cross multiply
    56,471.50x = 77,930.67 × 31,321
  4. Step 4: Simplify right side
    56,471.50x = 2,440,866,515.07
  5. Step 5: Solve for x
    x = 2,440,866,515.07/56,471.50
  6. Step 6: Final answer
    x = 43,222.98

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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.