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Finding the Fourth Proportional to 72,761.10, 100,422.36 and 45,918.24

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Solution

The fourth proportional to 72,761.10, 100,422.36 and 45,918.24 is: 63,374.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,761.10 : 100,422.36 = 45,918.24 : x
  2. Step 2: Convert to fraction form
    72,761.10/100,422.36 = 45,918.24/x
  3. Step 3: Cross multiply
    72,761.10x = 100,422.36 × 45,918.24
  4. Step 4: Simplify right side
    72,761.10x = 4,611,218,027.85
  5. Step 5: Solve for x
    x = 4,611,218,027.85/72,761.10
  6. Step 6: Final answer
    x = 63,374.77

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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.