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Finding the Fourth Proportional to 72,674.40, 100,007.28 and 64,310.88

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Solution

The fourth proportional to 72,674.40, 100,007.28 and 64,310.88 is: 88,498.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,674.40 : 100,007.28 = 64,310.88 : x
  2. Step 2: Convert to fraction form
    72,674.40/100,007.28 = 64,310.88/x
  3. Step 3: Cross multiply
    72,674.40x = 100,007.28 × 64,310.88
  4. Step 4: Simplify right side
    72,674.40x = 6,431,556,183.21
  5. Step 5: Solve for x
    x = 6,431,556,183.21/72,674.40
  6. Step 6: Final answer
    x = 88,498.24

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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.