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Finding the Fourth Proportional to 93,886.80, 141,175.80 and 78,680.40

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Solution

The fourth proportional to 93,886.80, 141,175.80 and 78,680.40 is: 118,310.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,886.80 : 141,175.80 = 78,680.40 : x
  2. Step 2: Convert to fraction form
    93,886.80/141,175.80 = 78,680.40/x
  3. Step 3: Cross multiply
    93,886.80x = 141,175.80 × 78,680.40
  4. Step 4: Simplify right side
    93,886.80x = 11,107,768,414.32
  5. Step 5: Solve for x
    x = 11,107,768,414.32/93,886.80
  6. Step 6: Final answer
    x = 118,310.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.