Home / 155,811.74-215,383.43-138,982.77

Finding the Fourth Proportional to 155,811.74, 215,383.43 and 138,982.77

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Solution

The fourth proportional to 155,811.74, 215,383.43 and 138,982.77 is: 192,120.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,811.74 : 215,383.43 = 138,982.77 : x
  2. Step 2: Convert to fraction form
    155,811.74/215,383.43 = 138,982.77/x
  3. Step 3: Cross multiply
    155,811.74x = 215,383.43 × 138,982.77
  4. Step 4: Simplify right side
    155,811.74x = 29,934,585,713.50
  5. Step 5: Solve for x
    x = 29,934,585,713.50/155,811.74
  6. Step 6: Final answer
    x = 192,120.22

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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.