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Finding the Fourth Proportional to 51,893.92, 71,740.86 and 51,420.04

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Solution

The fourth proportional to 51,893.92, 71,740.86 and 51,420.04 is: 71,085.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,893.92 : 71,740.86 = 51,420.04 : x
  2. Step 2: Convert to fraction form
    51,893.92/71,740.86 = 51,420.04/x
  3. Step 3: Cross multiply
    51,893.92x = 71,740.86 × 51,420.04
  4. Step 4: Simplify right side
    51,893.92x = 3,688,917,890.83
  5. Step 5: Solve for x
    x = 3,688,917,890.83/51,893.92
  6. Step 6: Final answer
    x = 71,085.74

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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.