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Finding the Fourth Proportional to 28,750.80, 43,100.60 and 25,640.40

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Solution

The fourth proportional to 28,750.80, 43,100.60 and 25,640.40 is: 38,437.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,750.80 : 43,100.60 = 25,640.40 : x
  2. Step 2: Convert to fraction form
    28,750.80/43,100.60 = 25,640.40/x
  3. Step 3: Cross multiply
    28,750.80x = 43,100.60 × 25,640.40
  4. Step 4: Simplify right side
    28,750.80x = 1,105,116,624.24
  5. Step 5: Solve for x
    x = 1,105,116,624.24/28,750.80
  6. Step 6: Final answer
    x = 38,437.77

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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.