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Finding the Fourth Proportional to 139,187.81, 209,170.52 and 130,225.97

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Solution

The fourth proportional to 139,187.81, 209,170.52 and 130,225.97 is: 195,702.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,187.81 : 209,170.52 = 130,225.97 : x
  2. Step 2: Convert to fraction form
    139,187.81/209,170.52 = 130,225.97/x
  3. Step 3: Cross multiply
    139,187.81x = 209,170.52 × 130,225.97
  4. Step 4: Simplify right side
    139,187.81x = 27,239,434,710.90
  5. Step 5: Solve for x
    x = 27,239,434,710.90/139,187.81
  6. Step 6: Final answer
    x = 195,702.73

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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.