Home / 79,130.18-109,212.32-45,149.72

Finding the Fourth Proportional to 79,130.18, 109,212.32 and 45,149.72

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Solution

The fourth proportional to 79,130.18, 109,212.32 and 45,149.72 is: 62,313.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,130.18 : 109,212.32 = 45,149.72 : x
  2. Step 2: Convert to fraction form
    79,130.18/109,212.32 = 45,149.72/x
  3. Step 3: Cross multiply
    79,130.18x = 109,212.32 × 45,149.72
  4. Step 4: Simplify right side
    79,130.18x = 4,930,904,896.74
  5. Step 5: Solve for x
    x = 4,930,904,896.74/79,130.18
  6. Step 6: Final answer
    x = 62,313.84

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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.