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Finding the Fourth Proportional to 134,101.20, 201,305.40 and 78,728.40

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Solution

The fourth proportional to 134,101.20, 201,305.40 and 78,728.40 is: 118,182.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,101.20 : 201,305.40 = 78,728.40 : x
  2. Step 2: Convert to fraction form
    134,101.20/201,305.40 = 78,728.40/x
  3. Step 3: Cross multiply
    134,101.20x = 201,305.40 × 78,728.40
  4. Step 4: Simplify right side
    134,101.20x = 15,848,452,053.36
  5. Step 5: Solve for x
    x = 15,848,452,053.36/134,101.20
  6. Step 6: Final answer
    x = 118,182.78

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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.