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Finding the Fourth Proportional to 79,391.68, 109,564.32 and 43,581.28

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Solution

The fourth proportional to 79,391.68, 109,564.32 and 43,581.28 is: 60,144.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,391.68 : 109,564.32 = 43,581.28 : x
  2. Step 2: Convert to fraction form
    79,391.68/109,564.32 = 43,581.28/x
  3. Step 3: Cross multiply
    79,391.68x = 109,564.32 × 43,581.28
  4. Step 4: Simplify right side
    79,391.68x = 4,774,953,307.93
  5. Step 5: Solve for x
    x = 4,774,953,307.93/79,391.68
  6. Step 6: Final answer
    x = 60,144.25

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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.