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Finding the Fourth Proportional to 100,355.76, 150,534.36 and 81,613.92

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Solution

The fourth proportional to 100,355.76, 150,534.36 and 81,613.92 is: 122,421.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,355.76 : 150,534.36 = 81,613.92 : x
  2. Step 2: Convert to fraction form
    100,355.76/150,534.36 = 81,613.92/x
  3. Step 3: Cross multiply
    100,355.76x = 150,534.36 × 81,613.92
  4. Step 4: Simplify right side
    100,355.76x = 12,285,699,214.29
  5. Step 5: Solve for x
    x = 12,285,699,214.29/100,355.76
  6. Step 6: Final answer
    x = 122,421.47

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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.