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Finding the Fourth Proportional to 124,555.80, 172,218.78 and 108,809.40

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Solution

The fourth proportional to 124,555.80, 172,218.78 and 108,809.40 is: 150,446.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,555.80 : 172,218.78 = 108,809.40 : x
  2. Step 2: Convert to fraction form
    124,555.80/172,218.78 = 108,809.40/x
  3. Step 3: Cross multiply
    124,555.80x = 172,218.78 × 108,809.40
  4. Step 4: Simplify right side
    124,555.80x = 18,739,022,120.53
  5. Step 5: Solve for x
    x = 18,739,022,120.53/124,555.80
  6. Step 6: Final answer
    x = 150,446.80

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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.