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Finding the Fourth Proportional to 126,752.20, 190,138.20 and 56,638.60

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Solution

The fourth proportional to 126,752.20, 190,138.20 and 56,638.60 is: 84,962.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,752.20 : 190,138.20 = 56,638.60 : x
  2. Step 2: Convert to fraction form
    126,752.20/190,138.20 = 56,638.60/x
  3. Step 3: Cross multiply
    126,752.20x = 190,138.20 × 56,638.60
  4. Step 4: Simplify right side
    126,752.20x = 10,769,161,454.52
  5. Step 5: Solve for x
    x = 10,769,161,454.52/126,752.20
  6. Step 6: Final answer
    x = 84,962.32

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1.5x scale

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.