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Finding the Fourth Proportional to 57,078.50, 78,790.42 and 51,099.80

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Solution

The fourth proportional to 57,078.50, 78,790.42 and 51,099.80 is: 70,537.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,078.50 : 78,790.42 = 51,099.80 : x
  2. Step 2: Convert to fraction form
    57,078.50/78,790.42 = 51,099.80/x
  3. Step 3: Cross multiply
    57,078.50x = 78,790.42 × 51,099.80
  4. Step 4: Simplify right side
    57,078.50x = 4,026,174,703.92
  5. Step 5: Solve for x
    x = 4,026,174,703.92/57,078.50
  6. Step 6: Final answer
    x = 70,537.50

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1.5x scale

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.