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Finding the Fourth Proportional to 72,798.39, 100,405.67 and 63,830.88

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Solution

The fourth proportional to 72,798.39, 100,405.67 and 63,830.88 is: 88,037.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,798.39 : 100,405.67 = 63,830.88 : x
  2. Step 2: Convert to fraction form
    72,798.39/100,405.67 = 63,830.88/x
  3. Step 3: Cross multiply
    72,798.39x = 100,405.67 × 63,830.88
  4. Step 4: Simplify right side
    72,798.39x = 6,408,981,953.94
  5. Step 5: Solve for x
    x = 6,408,981,953.94/72,798.39
  6. Step 6: Final answer
    x = 88,037.41

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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.