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Finding the Fourth Proportional to 143,143.20, 214,714.80 and 90,784.80

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Solution

The fourth proportional to 143,143.20, 214,714.80 and 90,784.80 is: 136,177.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,143.20 : 214,714.80 = 90,784.80 : x
  2. Step 2: Convert to fraction form
    143,143.20/214,714.80 = 90,784.80/x
  3. Step 3: Cross multiply
    143,143.20x = 214,714.80 × 90,784.80
  4. Step 4: Simplify right side
    143,143.20x = 19,492,840,175.04
  5. Step 5: Solve for x
    x = 19,492,840,175.04/143,143.20
  6. Step 6: Final answer
    x = 136,177.20

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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.