Home / 78,511.58-108,345.18-42,701.88

Finding the Fourth Proportional to 78,511.58, 108,345.18 and 42,701.88

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Solution

The fourth proportional to 78,511.58, 108,345.18 and 42,701.88 is: 58,928.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,511.58 : 108,345.18 = 42,701.88 : x
  2. Step 2: Convert to fraction form
    78,511.58/108,345.18 = 42,701.88/x
  3. Step 3: Cross multiply
    78,511.58x = 108,345.18 × 42,701.88
  4. Step 4: Simplify right side
    78,511.58x = 4,626,542,874.94
  5. Step 5: Solve for x
    x = 4,626,542,874.94/78,511.58
  6. Step 6: Final answer
    x = 58,928.16

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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.