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Finding the Fourth Proportional to 79,212.78, 109,313.62 and 47,389.16

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Solution

The fourth proportional to 79,212.78, 109,313.62 and 47,389.16 is: 65,397.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,212.78 : 109,313.62 = 47,389.16 : x
  2. Step 2: Convert to fraction form
    79,212.78/109,313.62 = 47,389.16/x
  3. Step 3: Cross multiply
    79,212.78x = 109,313.62 × 47,389.16
  4. Step 4: Simplify right side
    79,212.78x = 5,180,280,628.36
  5. Step 5: Solve for x
    x = 5,180,280,628.36/79,212.78
  6. Step 6: Final answer
    x = 65,397.03

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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.