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Finding the Fourth Proportional to 73,478.88, 100,740.41 and 72,150.28

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Solution

The fourth proportional to 73,478.88, 100,740.41 and 72,150.28 is: 98,918.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,478.88 : 100,740.41 = 72,150.28 : x
  2. Step 2: Convert to fraction form
    73,478.88/100,740.41 = 72,150.28/x
  3. Step 3: Cross multiply
    73,478.88x = 100,740.41 × 72,150.28
  4. Step 4: Simplify right side
    73,478.88x = 7,268,448,446.78
  5. Step 5: Solve for x
    x = 7,268,448,446.78/73,478.88
  6. Step 6: Final answer
    x = 98,918.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.