Home / 115,171.54-158,812.41-72,135.70

Finding the Fourth Proportional to 115,171.54, 158,812.41 and 72,135.70

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Solution

The fourth proportional to 115,171.54, 158,812.41 and 72,135.70 is: 99,469.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,171.54 : 158,812.41 = 72,135.70 : x
  2. Step 2: Convert to fraction form
    115,171.54/158,812.41 = 72,135.70/x
  3. Step 3: Cross multiply
    115,171.54x = 158,812.41 × 72,135.70
  4. Step 4: Simplify right side
    115,171.54x = 11,456,044,364.04
  5. Step 5: Solve for x
    x = 11,456,044,364.04/115,171.54
  6. Step 6: Final answer
    x = 99,469.40

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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.