Home / 115,422.25-159,285.39-72,403.56

Finding the Fourth Proportional to 115,422.25, 159,285.39 and 72,403.56

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Solution

The fourth proportional to 115,422.25, 159,285.39 and 72,403.56 is: 99,918.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,422.25 : 159,285.39 = 72,403.56 : x
  2. Step 2: Convert to fraction form
    115,422.25/159,285.39 = 72,403.56/x
  3. Step 3: Cross multiply
    115,422.25x = 159,285.39 × 72,403.56
  4. Step 4: Simplify right side
    115,422.25x = 11,532,828,495.56
  5. Step 5: Solve for x
    x = 11,532,828,495.56/115,422.25
  6. Step 6: Final answer
    x = 99,918.59

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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.