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Finding the Fourth Proportional to 188,517.78, 260,155.36 and 103,640.30

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Solution

The fourth proportional to 188,517.78, 260,155.36 and 103,640.30 is: 143,024.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,517.78 : 260,155.36 = 103,640.30 : x
  2. Step 2: Convert to fraction form
    188,517.78/260,155.36 = 103,640.30/x
  3. Step 3: Cross multiply
    188,517.78x = 260,155.36 × 103,640.30
  4. Step 4: Simplify right side
    188,517.78x = 26,962,579,557.01
  5. Step 5: Solve for x
    x = 26,962,579,557.01/188,517.78
  6. Step 6: Final answer
    x = 143,024.07

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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.