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Finding the Fourth Proportional to 72,438.80, 108,512.40 and 50,277.20

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Solution

The fourth proportional to 72,438.80, 108,512.40 and 50,277.20 is: 75,314.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,438.80 : 108,512.40 = 50,277.20 : x
  2. Step 2: Convert to fraction form
    72,438.80/108,512.40 = 50,277.20/x
  3. Step 3: Cross multiply
    72,438.80x = 108,512.40 × 50,277.20
  4. Step 4: Simplify right side
    72,438.80x = 5,455,699,637.28
  5. Step 5: Solve for x
    x = 5,455,699,637.28/72,438.80
  6. Step 6: Final answer
    x = 75,314.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.