Home / 91,005.39-136,508.09-28,680.75

Finding the Fourth Proportional to 91,005.39, 136,508.09 and 28,680.75

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Solution

The fourth proportional to 91,005.39, 136,508.09 and 28,680.75 is: 43,021.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,005.39 : 136,508.09 = 28,680.75 : x
  2. Step 2: Convert to fraction form
    91,005.39/136,508.09 = 28,680.75/x
  3. Step 3: Cross multiply
    91,005.39x = 136,508.09 × 28,680.75
  4. Step 4: Simplify right side
    91,005.39x = 3,915,154,258.86
  5. Step 5: Solve for x
    x = 3,915,154,258.86/91,005.39
  6. Step 6: Final answer
    x = 43,021.13

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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.