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Finding the Fourth Proportional to 72,378.56, 108,568.08 and 25,632.80

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Solution

The fourth proportional to 72,378.56, 108,568.08 and 25,632.80 is: 38,449.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,378.56 : 108,568.08 = 25,632.80 : x
  2. Step 2: Convert to fraction form
    72,378.56/108,568.08 = 25,632.80/x
  3. Step 3: Cross multiply
    72,378.56x = 108,568.08 × 25,632.80
  4. Step 4: Simplify right side
    72,378.56x = 2,782,903,881.02
  5. Step 5: Solve for x
    x = 2,782,903,881.02/72,378.56
  6. Step 6: Final answer
    x = 38,449.28

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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.