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Finding the Fourth Proportional to 79,220.78, 109,322.79 and 43,409.06

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Solution

The fourth proportional to 79,220.78, 109,322.79 and 43,409.06 is: 59,903.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,220.78 : 109,322.79 = 43,409.06 : x
  2. Step 2: Convert to fraction form
    79,220.78/109,322.79 = 43,409.06/x
  3. Step 3: Cross multiply
    79,220.78x = 109,322.79 × 43,409.06
  4. Step 4: Simplify right side
    79,220.78x = 4,745,599,550.48
  5. Step 5: Solve for x
    x = 4,745,599,550.48/79,220.78
  6. Step 6: Final answer
    x = 59,903.47

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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.