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Finding the Fourth Proportional to 84,750.80, 126,980.40 and 55,153.40

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Solution

The fourth proportional to 84,750.80, 126,980.40 and 55,153.40 is: 82,635.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,750.80 : 126,980.40 = 55,153.40 : x
  2. Step 2: Convert to fraction form
    84,750.80/126,980.40 = 55,153.40/x
  3. Step 3: Cross multiply
    84,750.80x = 126,980.40 × 55,153.40
  4. Step 4: Simplify right side
    84,750.80x = 7,003,400,793.36
  5. Step 5: Solve for x
    x = 7,003,400,793.36/84,750.80
  6. Step 6: Final answer
    x = 82,635.22

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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.