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Finding the Fourth Proportional to 139,228.80, 208,843.20 and 34,046.40

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Solution

The fourth proportional to 139,228.80, 208,843.20 and 34,046.40 is: 51,069.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,228.80 : 208,843.20 = 34,046.40 : x
  2. Step 2: Convert to fraction form
    139,228.80/208,843.20 = 34,046.40/x
  3. Step 3: Cross multiply
    139,228.80x = 208,843.20 × 34,046.40
  4. Step 4: Simplify right side
    139,228.80x = 7,110,359,124.48
  5. Step 5: Solve for x
    x = 7,110,359,124.48/139,228.80
  6. Step 6: Final answer
    x = 51,069.60

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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.