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Finding the Fourth Proportional to 149,783.70, 206,651.72 and 98,821.74

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Solution

The fourth proportional to 149,783.70, 206,651.72 and 98,821.74 is: 136,341.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,783.70 : 206,651.72 = 98,821.74 : x
  2. Step 2: Convert to fraction form
    149,783.70/206,651.72 = 98,821.74/x
  3. Step 3: Cross multiply
    149,783.70x = 206,651.72 × 98,821.74
  4. Step 4: Simplify right side
    149,783.70x = 20,421,682,544.39
  5. Step 5: Solve for x
    x = 20,421,682,544.39/149,783.70
  6. Step 6: Final answer
    x = 136,341.15

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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.