Home / 78,338.26-108,107.02-42,528.43

Finding the Fourth Proportional to 78,338.26, 108,107.02 and 42,528.43

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Solution

The fourth proportional to 78,338.26, 108,107.02 and 42,528.43 is: 58,689.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,338.26 : 108,107.02 = 42,528.43 : x
  2. Step 2: Convert to fraction form
    78,338.26/108,107.02 = 42,528.43/x
  3. Step 3: Cross multiply
    78,338.26x = 108,107.02 × 42,528.43
  4. Step 4: Simplify right side
    78,338.26x = 4,597,621,832.58
  5. Step 5: Solve for x
    x = 4,597,621,832.58/78,338.26
  6. Step 6: Final answer
    x = 58,689.35

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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.