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Finding the Fourth Proportional to 79,214.76, 109,316.43 and 47,391.21

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Solution

The fourth proportional to 79,214.76, 109,316.43 and 47,391.21 is: 65,399.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,214.76 : 109,316.43 = 47,391.21 : x
  2. Step 2: Convert to fraction form
    79,214.76/109,316.43 = 47,391.21/x
  3. Step 3: Cross multiply
    79,214.76x = 109,316.43 × 47,391.21
  4. Step 4: Simplify right side
    79,214.76x = 5,180,637,890.58
  5. Step 5: Solve for x
    x = 5,180,637,890.58/79,214.76
  6. Step 6: Final answer
    x = 65,399.91

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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.