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Finding the Fourth Proportional to 95,686, 142,518.23 and 90,689.92

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Solution

The fourth proportional to 95,686, 142,518.23 and 90,689.92 is: 135,076.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    95,686 : 142,518.23 = 90,689.92 : x
  2. Step 2: Convert to fraction form
    95,686/142,518.23 = 90,689.92/x
  3. Step 3: Cross multiply
    95,686x = 142,518.23 × 90,689.92
  4. Step 4: Simplify right side
    95,686x = 12,924,966,877.24
  5. Step 5: Solve for x
    x = 12,924,966,877.24/95,686
  6. Step 6: Final answer
    x = 135,076.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.