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Finding the Fourth Proportional to 72,212.75, 99,651.73 and 39,946.53

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Solution

The fourth proportional to 72,212.75, 99,651.73 and 39,946.53 is: 55,125.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,212.75 : 99,651.73 = 39,946.53 : x
  2. Step 2: Convert to fraction form
    72,212.75/99,651.73 = 39,946.53/x
  3. Step 3: Cross multiply
    72,212.75x = 99,651.73 × 39,946.53
  4. Step 4: Simplify right side
    72,212.75x = 3,980,740,685.08
  5. Step 5: Solve for x
    x = 3,980,740,685.08/72,212.75
  6. Step 6: Final answer
    x = 55,125.18

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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.