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Finding the Fourth Proportional to 51,374.70, 70,892.46 and 28,710.72

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Solution

The fourth proportional to 51,374.70, 70,892.46 and 28,710.72 is: 39,618.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,374.70 : 70,892.46 = 28,710.72 : x
  2. Step 2: Convert to fraction form
    51,374.70/70,892.46 = 28,710.72/x
  3. Step 3: Cross multiply
    51,374.70x = 70,892.46 × 28,710.72
  4. Step 4: Simplify right side
    51,374.70x = 2,035,373,569.17
  5. Step 5: Solve for x
    x = 2,035,373,569.17/51,374.70
  6. Step 6: Final answer
    x = 39,618.21

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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.