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Finding the Fourth Proportional to 101,905.40, 153,003.90 and 72,453.80

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Solution

The fourth proportional to 101,905.40, 153,003.90 and 72,453.80 is: 108,784.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,905.40 : 153,003.90 = 72,453.80 : x
  2. Step 2: Convert to fraction form
    101,905.40/153,003.90 = 72,453.80/x
  3. Step 3: Cross multiply
    101,905.40x = 153,003.90 × 72,453.80
  4. Step 4: Simplify right side
    101,905.40x = 11,085,713,969.82
  5. Step 5: Solve for x
    x = 11,085,713,969.82/101,905.40
  6. Step 6: Final answer
    x = 108,784.36

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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.