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Finding the Fourth Proportional to 79,386.64, 109,555.86 and 43,578.97

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Solution

The fourth proportional to 79,386.64, 109,555.86 and 43,578.97 is: 60,140.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,386.64 : 109,555.86 = 43,578.97 : x
  2. Step 2: Convert to fraction form
    79,386.64/109,555.86 = 43,578.97/x
  3. Step 3: Cross multiply
    79,386.64x = 109,555.86 × 43,578.97
  4. Step 4: Simplify right side
    79,386.64x = 4,774,331,536.26
  5. Step 5: Solve for x
    x = 4,774,331,536.26/79,386.64
  6. Step 6: Final answer
    x = 60,140.24

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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.