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Finding the Fourth Proportional to 138,737.80, 208,106.70 and 49,994.20

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Solution

The fourth proportional to 138,737.80, 208,106.70 and 49,994.20 is: 74,991.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,737.80 : 208,106.70 = 49,994.20 : x
  2. Step 2: Convert to fraction form
    138,737.80/208,106.70 = 49,994.20/x
  3. Step 3: Cross multiply
    138,737.80x = 208,106.70 × 49,994.20
  4. Step 4: Simplify right side
    138,737.80x = 10,404,127,981.14
  5. Step 5: Solve for x
    x = 10,404,127,981.14/138,737.80
  6. Step 6: Final answer
    x = 74,991.30

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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.