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Finding the Fourth Proportional to 72,257.80, 99,749.85 and 54,359.63

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Solution

The fourth proportional to 72,257.80, 99,749.85 and 54,359.63 is: 75,041.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,257.80 : 99,749.85 = 54,359.63 : x
  2. Step 2: Convert to fraction form
    72,257.80/99,749.85 = 54,359.63/x
  3. Step 3: Cross multiply
    72,257.80x = 99,749.85 × 54,359.63
  4. Step 4: Simplify right side
    72,257.80x = 5,422,364,938.56
  5. Step 5: Solve for x
    x = 5,422,364,938.56/72,257.80
  6. Step 6: Final answer
    x = 75,041.93

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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.