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Finding the Fourth Proportional to 78,880.05, 108,858.90 and 43,073.40

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Solution

The fourth proportional to 78,880.05, 108,858.90 and 43,073.40 is: 59,443.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,880.05 : 108,858.90 = 43,073.40 : x
  2. Step 2: Convert to fraction form
    78,880.05/108,858.90 = 43,073.40/x
  3. Step 3: Cross multiply
    78,880.05x = 108,858.90 × 43,073.40
  4. Step 4: Simplify right side
    78,880.05x = 4,688,922,943.26
  5. Step 5: Solve for x
    x = 4,688,922,943.26/78,880.05
  6. Step 6: Final answer
    x = 59,443.71

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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.