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Finding the Fourth Proportional to 125,940.63, 188,984.75 and 90,363.60

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Solution

The fourth proportional to 125,940.63, 188,984.75 and 90,363.60 is: 135,598.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,940.63 : 188,984.75 = 90,363.60 : x
  2. Step 2: Convert to fraction form
    125,940.63/188,984.75 = 90,363.60/x
  3. Step 3: Cross multiply
    125,940.63x = 188,984.75 × 90,363.60
  4. Step 4: Simplify right side
    125,940.63x = 17,077,341,903.28
  5. Step 5: Solve for x
    x = 17,077,341,903.28/125,940.63
  6. Step 6: Final answer
    x = 135,598.36

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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.