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Finding the Fourth Proportional to 93,761.70, 129,390.93 and 51,319.86

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Solution

The fourth proportional to 93,761.70, 129,390.93 and 51,319.86 is: 70,821.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,761.70 : 129,390.93 = 51,319.86 : x
  2. Step 2: Convert to fraction form
    93,761.70/129,390.93 = 51,319.86/x
  3. Step 3: Cross multiply
    93,761.70x = 129,390.93 × 51,319.86
  4. Step 4: Simplify right side
    93,761.70x = 6,640,324,412.87
  5. Step 5: Solve for x
    x = 6,640,324,412.87/93,761.70
  6. Step 6: Final answer
    x = 70,821.29

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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.