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Finding the Fourth Proportional to 101,906.40, 153,005.40 and 72,454.80

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Solution

The fourth proportional to 101,906.40, 153,005.40 and 72,454.80 is: 108,785.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,906.40 : 153,005.40 = 72,454.80 : x
  2. Step 2: Convert to fraction form
    101,906.40/153,005.40 = 72,454.80/x
  3. Step 3: Cross multiply
    101,906.40x = 153,005.40 × 72,454.80
  4. Step 4: Simplify right side
    101,906.40x = 11,085,975,655.92
  5. Step 5: Solve for x
    x = 11,085,975,655.92/101,906.40
  6. Step 6: Final answer
    x = 108,785.86

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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.