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Finding the Fourth Proportional to 51,402.87, 70,939.49 and 28,741.40

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Solution

The fourth proportional to 51,402.87, 70,939.49 and 28,741.40 is: 39,665.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,402.87 : 70,939.49 = 28,741.40 : x
  2. Step 2: Convert to fraction form
    51,402.87/70,939.49 = 28,741.40/x
  3. Step 3: Cross multiply
    51,402.87x = 70,939.49 × 28,741.40
  4. Step 4: Simplify right side
    51,402.87x = 2,038,900,257.89
  5. Step 5: Solve for x
    x = 2,038,900,257.89/51,402.87
  6. Step 6: Final answer
    x = 39,665.11

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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.