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Finding the Fourth Proportional to 79,021.69, 109,048.87 and 45,032.20

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Solution

The fourth proportional to 79,021.69, 109,048.87 and 45,032.20 is: 62,143.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,021.69 : 109,048.87 = 45,032.20 : x
  2. Step 2: Convert to fraction form
    79,021.69/109,048.87 = 45,032.20/x
  3. Step 3: Cross multiply
    79,021.69x = 109,048.87 × 45,032.20
  4. Step 4: Simplify right side
    79,021.69x = 4,910,710,523.61
  5. Step 5: Solve for x
    x = 4,910,710,523.61/79,021.69
  6. Step 6: Final answer
    x = 62,143.83

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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.