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Finding the Fourth Proportional to 95,864.10, 143,796.15 and 90,420.90

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Solution

The fourth proportional to 95,864.10, 143,796.15 and 90,420.90 is: 135,631.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    95,864.10 : 143,796.15 = 90,420.90 : x
  2. Step 2: Convert to fraction form
    95,864.10/143,796.15 = 90,420.90/x
  3. Step 3: Cross multiply
    95,864.10x = 143,796.15 × 90,420.90
  4. Step 4: Simplify right side
    95,864.10x = 13,002,177,299.54
  5. Step 5: Solve for x
    x = 13,002,177,299.54/95,864.10
  6. Step 6: Final answer
    x = 135,631.35

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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.