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Finding the Fourth Proportional to 79,172.55, 109,254.09 and 43,355.65

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Solution

The fourth proportional to 79,172.55, 109,254.09 and 43,355.65 is: 59,828.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,172.55 : 109,254.09 = 43,355.65 : x
  2. Step 2: Convert to fraction form
    79,172.55/109,254.09 = 43,355.65/x
  3. Step 3: Cross multiply
    79,172.55x = 109,254.09 × 43,355.65
  4. Step 4: Simplify right side
    79,172.55x = 4,736,782,087.11
  5. Step 5: Solve for x
    x = 4,736,782,087.11/79,172.55
  6. Step 6: Final answer
    x = 59,828.59

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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.