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Finding the Fourth Proportional to 72,551.10, 100,135.44 and 45,675.57

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Solution

The fourth proportional to 72,551.10, 100,135.44 and 45,675.57 is: 63,041.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,551.10 : 100,135.44 = 45,675.57 : x
  2. Step 2: Convert to fraction form
    72,551.10/100,135.44 = 45,675.57/x
  3. Step 3: Cross multiply
    72,551.10x = 100,135.44 × 45,675.57
  4. Step 4: Simplify right side
    72,551.10x = 4,573,743,299.20
  5. Step 5: Solve for x
    x = 4,573,743,299.20/72,551.10
  6. Step 6: Final answer
    x = 63,041.68

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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.