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Finding the Fourth Proportional to 138,970.80, 208,456.20 and 50,252.40

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Solution

The fourth proportional to 138,970.80, 208,456.20 and 50,252.40 is: 75,378.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,970.80 : 208,456.20 = 50,252.40 : x
  2. Step 2: Convert to fraction form
    138,970.80/208,456.20 = 50,252.40/x
  3. Step 3: Cross multiply
    138,970.80x = 208,456.20 × 50,252.40
  4. Step 4: Simplify right side
    138,970.80x = 10,475,424,344.88
  5. Step 5: Solve for x
    x = 10,475,424,344.88/138,970.80
  6. Step 6: Final answer
    x = 75,378.60

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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.