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Finding the Fourth Proportional to 139,878.80, 192,586.92 and 130,340.24

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Solution

The fourth proportional to 139,878.80, 192,586.92 and 130,340.24 is: 179,454.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,878.80 : 192,586.92 = 130,340.24 : x
  2. Step 2: Convert to fraction form
    139,878.80/192,586.92 = 130,340.24/x
  3. Step 3: Cross multiply
    139,878.80x = 192,586.92 × 130,340.24
  4. Step 4: Simplify right side
    139,878.80x = 25,101,825,373.66
  5. Step 5: Solve for x
    x = 25,101,825,373.66/139,878.80
  6. Step 6: Final answer
    x = 179,454.11

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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.