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Finding the Fourth Proportional to 60,789.51, 91,140.59 and 28,750.79

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Solution

The fourth proportional to 60,789.51, 91,140.59 and 28,750.79 is: 43,105.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,789.51 : 91,140.59 = 28,750.79 : x
  2. Step 2: Convert to fraction form
    60,789.51/91,140.59 = 28,750.79/x
  3. Step 3: Cross multiply
    60,789.51x = 91,140.59 × 28,750.79
  4. Step 4: Simplify right side
    60,789.51x = 2,620,364,263.29
  5. Step 5: Solve for x
    x = 2,620,364,263.29/60,789.51
  6. Step 6: Final answer
    x = 43,105.54

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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.