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Finding the Fourth Proportional to 115,204.81, 159,012.71 and 75,028.81

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Solution

The fourth proportional to 115,204.81, 159,012.71 and 75,028.81 is: 103,559.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,204.81 : 159,012.71 = 75,028.81 : x
  2. Step 2: Convert to fraction form
    115,204.81/159,012.71 = 75,028.81/x
  3. Step 3: Cross multiply
    115,204.81x = 159,012.71 × 75,028.81
  4. Step 4: Simplify right side
    115,204.81x = 11,930,534,406.18
  5. Step 5: Solve for x
    x = 11,930,534,406.18/115,204.81
  6. Step 6: Final answer
    x = 103,559.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.