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Finding the Fourth Proportional to 190,128.30, 285,207.30 and 84,957.90

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Solution

The fourth proportional to 190,128.30, 285,207.30 and 84,957.90 is: 127,443.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,128.30 : 285,207.30 = 84,957.90 : x
  2. Step 2: Convert to fraction form
    190,128.30/285,207.30 = 84,957.90/x
  3. Step 3: Cross multiply
    190,128.30x = 285,207.30 × 84,957.90
  4. Step 4: Simplify right side
    190,128.30x = 24,230,613,272.67
  5. Step 5: Solve for x
    x = 24,230,613,272.67/190,128.30
  6. Step 6: Final answer
    x = 127,443.49

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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.