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Finding the Fourth Proportional to 114,421.70, 171,632.55 and 72,431.30

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Solution

The fourth proportional to 114,421.70, 171,632.55 and 72,431.30 is: 108,646.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,421.70 : 171,632.55 = 72,431.30 : x
  2. Step 2: Convert to fraction form
    114,421.70/171,632.55 = 72,431.30/x
  3. Step 3: Cross multiply
    114,421.70x = 171,632.55 × 72,431.30
  4. Step 4: Simplify right side
    114,421.70x = 12,431,568,718.82
  5. Step 5: Solve for x
    x = 12,431,568,718.82/114,421.70
  6. Step 6: Final answer
    x = 108,646.95

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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.