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Finding the Fourth Proportional to 188,478.90, 260,099.10 and 107,920.62

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Solution

The fourth proportional to 188,478.90, 260,099.10 and 107,920.62 is: 148,929.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,478.90 : 260,099.10 = 107,920.62 : x
  2. Step 2: Convert to fraction form
    188,478.90/260,099.10 = 107,920.62/x
  3. Step 3: Cross multiply
    188,478.90x = 260,099.10 × 107,920.62
  4. Step 4: Simplify right side
    188,478.90x = 28,070,056,133.44
  5. Step 5: Solve for x
    x = 28,070,056,133.44/188,478.90
  6. Step 6: Final answer
    x = 148,929.44

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1.5x scale

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.