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Finding the Fourth Proportional to 48,668.81, 72,988.11 and 20,588.40

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Solution

The fourth proportional to 48,668.81, 72,988.11 and 20,588.40 is: 30,876.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,668.81 : 72,988.11 = 20,588.40 : x
  2. Step 2: Convert to fraction form
    48,668.81/72,988.11 = 20,588.40/x
  3. Step 3: Cross multiply
    48,668.81x = 72,988.11 × 20,588.40
  4. Step 4: Simplify right side
    48,668.81x = 1,502,708,403.92
  5. Step 5: Solve for x
    x = 1,502,708,403.92/48,668.81
  6. Step 6: Final answer
    x = 30,876.21

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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.