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Finding the Fourth Proportional to 72,055.80, 99,441 and 40,224.96

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Solution

The fourth proportional to 72,055.80, 99,441 and 40,224.96 is: 55,512.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,055.80 : 99,441 = 40,224.96 : x
  2. Step 2: Convert to fraction form
    72,055.80/99,441 = 40,224.96/x
  3. Step 3: Cross multiply
    72,055.80x = 99,441 × 40,224.96
  4. Step 4: Simplify right side
    72,055.80x = 4,000,010,247.36
  5. Step 5: Solve for x
    x = 4,000,010,247.36/72,055.80
  6. Step 6: Final answer
    x = 55,512.68

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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.