Home / 155,976.84-215,249.40-99,387

Finding the Fourth Proportional to 155,976.84, 215,249.40 and 99,387

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Solution

The fourth proportional to 155,976.84, 215,249.40 and 99,387 is: 137,154.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,976.84 : 215,249.40 = 99,387 : x
  2. Step 2: Convert to fraction form
    155,976.84/215,249.40 = 99,387/x
  3. Step 3: Cross multiply
    155,976.84x = 215,249.40 × 99,387
  4. Step 4: Simplify right side
    155,976.84x = 21,392,992,117.80
  5. Step 5: Solve for x
    x = 21,392,992,117.80/155,976.84
  6. Step 6: Final answer
    x = 137,154.93

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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.