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Finding the Fourth Proportional to 103,632.80, 155,218.80 and 89,808.80

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Solution

The fourth proportional to 103,632.80, 155,218.80 and 89,808.80 is: 134,513.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,632.80 : 155,218.80 = 89,808.80 : x
  2. Step 2: Convert to fraction form
    103,632.80/155,218.80 = 89,808.80/x
  3. Step 3: Cross multiply
    103,632.80x = 155,218.80 × 89,808.80
  4. Step 4: Simplify right side
    103,632.80x = 13,940,014,165.44
  5. Step 5: Solve for x
    x = 13,940,014,165.44/103,632.80
  6. Step 6: Final answer
    x = 134,513.53

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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.