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Finding the Fourth Proportional to 50,478.88, 75,718.32 and 31,972

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Solution

The fourth proportional to 50,478.88, 75,718.32 and 31,972 is: 47,958.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,478.88 : 75,718.32 = 31,972 : x
  2. Step 2: Convert to fraction form
    50,478.88/75,718.32 = 31,972/x
  3. Step 3: Cross multiply
    50,478.88x = 75,718.32 × 31,972
  4. Step 4: Simplify right side
    50,478.88x = 2,420,866,127.04
  5. Step 5: Solve for x
    x = 2,420,866,127.04/50,478.88
  6. Step 6: Final answer
    x = 47,958.00

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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.