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Finding the Fourth Proportional to 72,292.78, 99,760.11 and 40,455.52

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Solution

The fourth proportional to 72,292.78, 99,760.11 and 40,455.52 is: 55,826.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,292.78 : 99,760.11 = 40,455.52 : x
  2. Step 2: Convert to fraction form
    72,292.78/99,760.11 = 40,455.52/x
  3. Step 3: Cross multiply
    72,292.78x = 99,760.11 × 40,455.52
  4. Step 4: Simplify right side
    72,292.78x = 4,035,847,125.31
  5. Step 5: Solve for x
    x = 4,035,847,125.31/72,292.78
  6. Step 6: Final answer
    x = 55,826.42

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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.