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Finding the Fourth Proportional to 101,128.80, 151,790.40 and 51,265.20

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Solution

The fourth proportional to 101,128.80, 151,790.40 and 51,265.20 is: 76,947.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,128.80 : 151,790.40 = 51,265.20 : x
  2. Step 2: Convert to fraction form
    101,128.80/151,790.40 = 51,265.20/x
  3. Step 3: Cross multiply
    101,128.80x = 151,790.40 × 51,265.20
  4. Step 4: Simplify right side
    101,128.80x = 7,781,565,214.08
  5. Step 5: Solve for x
    x = 7,781,565,214.08/101,128.80
  6. Step 6: Final answer
    x = 76,947.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.