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Finding the Fourth Proportional to 254,348.49, 381,518.84 and 85,987.08

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Solution

The fourth proportional to 254,348.49, 381,518.84 and 85,987.08 is: 128,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,348.49 : 381,518.84 = 85,987.08 : x
  2. Step 2: Convert to fraction form
    254,348.49/381,518.84 = 85,987.08/x
  3. Step 3: Cross multiply
    254,348.49x = 381,518.84 × 85,987.08
  4. Step 4: Simplify right side
    254,348.49x = 32,805,690,586.65
  5. Step 5: Solve for x
    x = 32,805,690,586.65/254,348.49
  6. Step 6: Final answer
    x = 128,979.30

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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.